Ok, that is informative. Without that specific context, that message is utterly empty and useless.
Of course, it still feels weird, that “legitimate interest” seems a subjective term and maybe they could have found some better phrasing to reflect this sentiment…
Right, I was thinking not the developer, not the ad network, but all the way back to the wording of GDPR.
In fact, it feels like an ad network cannot have a “legitimate interest” in personal information of someone who opts out. If they count targeted advertising without consent as “legitimate interest”, seems like GPDR is significantly less useful.