I thought Funcaptcha is the best option against bots, but today I found a major flaw in Funcaptcha. In a normal Funcaptcha a user has to solve two or three images (moving the woman to center or rotating it to correct position) to claim. An hour ago I visited a faucet with Funcaptcha, I accidentally clicked the claim button just after solving one image and the claim was credited. I tried this on a couple of more faucets and the same result.

So basically you just need to solve 1 Funcaptcha image to claim

I visited a faucet with advanced Funcaptcha option (6 images to solve), but on this faucet I was not able to claim after solving one image which is good.

I believe Funcaptcha does prevent bot abuse, but solving just one image might make it a bit vulnerable.

Opting for advanced option might be annoying to users. Solving three images is more than enough, but Funcaptcha developers have to make sure the captcha is not validated till three images are confirmed