Spotting fake engagement is exactly what an authenticity check is for. The signals are engagement that is oddly uniform, comments that read like bot phrases and interaction out of step with the follower base. A fake-follower and authenticity score packages those signals so you do not have to eyeball every account.
Whether a platform can flag engagement that is bought or bot-driven rather than genuine.
Fake engagement leaves a pattern once you know what to look for. Generic or repetitive comments, likes that spike without matching reach and an engagement rate that is either implausibly high or oddly flat all point to bought activity. A human can spot this on one account, though it does not scale across a shortlist. That is where an automated score helps, since it reads the signals consistently. Flinque gives every creator a fake-follower score and audience data across four platforms, which surfaces bought engagement before you commit budget. The free checker at /free-tools/ gives a quick read on a single account, while a full search at /find-influencers/ screens as you go.