1 - You can create an account by registering with the forum - check my website link. Once you receive your verification email and logged into the forum please read through all the forum guidelines as the site works a little differently to others - It uses Proof of Content to mine BTCUI via forum posts so the content needs to be of good quality and not just block text, short responses or random thanks for example.

2 - If you read through the guidelines and help sections, you will come across a Withdrawal BTCUI help post. This explains the withdrawal procedure. I can confirm that requesting cashouts are very simple IF you have followed or reached the cashout requirements (BTCUI minimum amount (currently 2500BTCUI), added an account avatar to your profile, entered your ETH address and contributed to the forum and received 3 thanks.) Once this has been done you can transfer your BTCUI to the internal cashout account. From here you need to give the system time to check you have fully meet the withdrawal requirements - and then you will receive your cashout to your ETH address.

3 - BTCUI is currently listed on Mercatox and ForkDelta