Some of these Captcha's are developed to make it extremely difficult to solve. I especially hate ReCaptha Version 2 with the images. Give me Solve media and keep it simple.
If I see a faucet site using ReCaptha Version 2 .... I just give it a skip. It's just too low quality images used and over complicated for a quick hit n run.
I think they do this on purpose, to increase the use of these services. Keep it simple and the people will re-visit your site. Sites like Freebitco.in gives you the option to
choose what Captha provider you want to use, and that is ideal.