[MrOwnPut]

Certainly, but the second you get a rouge actor, your advertisers are going to be pissed.

At the very best the rouge app won't display ads.

At the worse, they'll ignore a nsfw tag and won't show the spoiler overlay, angering your advertiser.

Audits can catch it, but only after the damage is done.

I don't think there's any service that lets their ad supported plan be in the hands of a 3rd party client.