It's a Facebook approved app through and everything stays within Facebook's ecosystem. Check it out: https://blog.repixel.co/2019/07/01/facebook-and-gdpr-complia...
> Cross-site tracking is tracking across multiple first party websites; tracking between websites and apps; or the retention, use, or sharing of data from that activity with parties other than the first party on which it was collected.
I think that having Facebook share tracking information with Repixel and in turn with Repixel's customers counts as "sharing of data from that activity with parties other than the first party on which it was collected," no?
Fair enough. My preference is different. I don't care about seeing ads, and I couldn't care less if they're "relevant" or not. But I strongly object to the data collection required to target ads and want it to stop.