If captcha is not showing properly, kindly zoom out to see full captcha, partial captcha filling can be a cause for failing captcha. Withdraw threshold is implemented and a withdraw button will appear once you reach threshold of 0.004 POT which can be easily reached with a few claims.
What is a Potcoin Faucet
Potcoin faucets are a reward system, in the form of a website or app, that dispenses rewards in the form of a POT, which is a hundredth of a millionth POT, for visitors to claim in exchange for completing a captcha or task as described by the website. There are also faucets that dispense alternative cryptocurrencies.
Rewards are dispensed at various predetermined intervals of time. Faucets usually give fractions of a Potcoin, but the amount will typically fluctuate according to the value of Potcoin.
Faucets are a great way to help introduce new people to Potcoin, or to your favourite altcoin. Many faucets provide information to newbies as well as offering them some free coins so that they can try before they buy, experimenting with a test transaction or two before putting real money on the line. Since this whole area is so new and a bit scary to some people, who perhaps don't quite trust it with their hard earned cash yet, this is a great way to promote digital currency and bring in new users.