裁判所におけるターゲティング広告とプロファイリング

In the age of digital marketing, targeted advertising そして user profiling have become key tools for platforms, publishers, そして advertisers. However, these data-driven techniques are under intense legal scrutiny, especially under the General Data Protection Regulation (GDPR) そして the ePrivacy Directive. European courts そして data protection authorities (DPAs) are increasingly examining the legality, transparency, そして consent mechanisms behind behavioral advertising, with rulings that carry significant implications for the ad tech ecosystem.

This article explores high-profile case studies そして enforcement actions across the EU, focusing on how profiling for advertising purposes has been challenged under privacy laws—そして what lessons platforms そして marketers should take away.

1. CNIL v Google (France, 2020): Cookie Consent そして Tracking

In 2020, the French Data Protection Authority (CNIL) fined Google €100 million for placing advertising cookies without prior user consent on its French domains. について cookies enabled tracking for personalized ads but were activated 前に users made any meaningful choice.

Key Issues:

• Lack of valid consent under the ePrivacy Directive.
• Users were not sufficiently informed about the purpose of cookies or how to reject them.
• について cookie banner provided only an "Accept" option, without an equivalent "Refuse."

Legal Grounds:

• ePrivacy Directive (2002/58/EC) as implemented in French law.
• Article 5(3) of the ePrivacy Directive requires prior consent 前に storing or accessing information on a user’s device.

Outcome:
Google was fined そして subsequently updated its consent banners to provide granular choices そして symmetric options for acceptance そして refusal.

Lesson:
Consent for profiling そして targeted advertising must be freely given, specific, informed, そして unambiguous—そして implemented 前に any tracking begins.

2. Bundeskartellamt v Meta (Germany, ongoing): Combining Data Across Services

について German Competition Authority (Bundeskartellamt) initiated proceedings against Meta (formerly Facebook) for combining user data from Facebook, Instagram, WhatsApp, そして third-party websites without proper consent.

Key Legal Twist:
Although the case originated under competition law, the authority relied heavily on GDPR violations—arguing that Meta’s failure to obtain valid consent gave it an unfair advantage in the advertising market.

Court Developments:

• について German Federal Court of Justice upheld the regulator’s decision to restrict data processing practices.
• について CJEU was asked for a preliminary ruling to clarify the intersection of data protection そして competition law (Case C-252/21, pending as of 2025).

Legal Questions:

• Whether the combination of data across services without consent violates Articles 6 そして 9 GDPR.
• Whether the user is offered a real choice or is coerced into acceptance via bundled services.

Lesson:
Profiling based on cross-platform data must be backed by a valid legal basis, usually opt-in consent, そして must not be a condition for using the core service.

3. NOYB Complaints Against IAB Europe’s TCF (EU-wide): Real-Time Bidding Scrutiny

について nonprofit NOYB (None of Your Business) filed multiple complaints against the IAB Europe’s Transparency そして Consent Framework (TCF), which is widely used in real-time bidding (RTB) for targeted ads.

Main Allegations:

• について TCF failed to provide genuine, informed consent.
• Profiling under RTB shared user data with hundreds of vendors in real time, often without user awareness.
• について framework was deemed non-compliant with GDPR's principles of data minimization, purpose limitation, そして lawful basis.

Belgian DPA Ruling (2022):

• Found IAB Europe responsible as a ジョイントコントローラー for data processing in the TCF.
• Ordered significant changes to the consent mechanism そして data sharing practices.

Outcome:
IAB Europe was required to redesign the TCF, introduce stronger safeguards, そして better control downstream data use by vendors.

Lesson:
Consent frameworks used for programmatic advertising must not only meet GDPR stそしてards, but also ensure enforceable governance across the ad tech chain.

4. Planet49 Case (CJEU, C-673/17): Pre-Ticked Boxes そして Consent Validity

について Planet49 case 前に the Court of Justice of the EU (CJEU) examined whether pre-ticked boxes constitute valid consent for cookies used in promotional games そして behavioral advertising.

CJEU Ruling:

• Consent must be active, meaning pre-checked boxes do not suffice.
• について duration そして third-party access of cookies must also be disclosed to the user in advance.

Legal Implications:

• Confirmed that both GDPR そして ePrivacy require affirmative action そして clear disclosure for lawful profiling.

Lesson:
Platforms must design consent interfaces that ensure clear user engagement, not passive or implied agreement.

Key Takeaways for Platforms そして Ad Tech Operators

Consent is central—そして must be granular, informed, そして revocable.
Profiling for targeted ads requires a valid legal basis, typically Article 6(1)(a) GDPR.
Transparency must be comprehensive: who processes the data, for what purposes, そして for how long.
Joint controllership may apply—platforms そして advertising partners may share responsibility for GDPR compliance.
Consent frameworks (e.g., CMPs, TCFs) must be auditable そして enforceable across all recipients of user data.

Looking Ahead: について Role of the ePrivacy Regulation そして DSA

As enforcement under GDPR intensifies, the future of profiling regulation will also be shaped by:

• について long-delayed ePrivacy Regulation, which may stそしてardize consent rules across the EU.
• について Digital Services Act (DSA), which introduces obligations on transparency of online advertising そして recommender systems—especially for Very Large Online Platforms (VLOPs).

Together, these frameworks will significantly affect targeted advertising models, particularly those reliant on real-time bidding, data brokering, or opaque personalization.

結論

Profiling そして targeted advertising are no longer grey areas in EU privacy law. について courts そして regulators are setting clear limits on how user data can be used, shared, そして monetized—especially when it comes to behavioral targeting. Platforms そして ad tech providers that fail to align with GDPR そして ePrivacy stそしてards face growing legal, financial, そして reputational risks.