[mojzu]

It seems like they were just a client for Instagram which was stripping out the ads, which would probably be a pretty clear cut violation of Instagram ToS or whatever API they were using, so I'm not surprised Google/Apple would remove it from their stores

[vorpalhex]

Google and Apple aren't, or shouldn't be, the ToS enforcers for Meta.

It's a ToS violation, not a legal one.

[dagmx]

They are however copyright enforcers and have detailed copyright infringement policies