Filling out some form won't help if someone finds out they're not doing what they said they will do. The data protection agencies will sue if they find that out

Filling out some form won't help if someone finds out they're not doing what they said they will do. The data protection agencies will sue if they find that out. And they did find out that Grindr was selling data it wasn't allowed to. Fines are scaled according to revenue. That's the reason for the monumental fines leveled at Google and Facebook. They don't mess around. I believe Grindr's fine was just based on their revenue from Norwegian users. Probably plenty hurtful enough to make them implement data protection in the jurisdictions which demand it.