Fake recaptcha button (courtesy of bee-ads.com)
Fake claim button (courtesy of adbit.co)
I don't know the right term for it, but I call it "ad mimicry". you can see it all around internet, not only faucet sites.
torrent tracker? expect ads that say "download torrent", magnet icons, etc.
software website? expect ads that say "download".
faucet? ads that look like wallet address fields, captchas, claim buttons.
just desperate click bait, but I know many people fall for that. (especially when the real download/claim link is very small)