Определите стоимость и укажите контакты для связи хотя бы, а то не предложение, а не пойми что.

Подобных сервисов очень много, но оттуда идут "боты", которые не проходят твиттераудит.

Beware this is scam. Don't give them your bitcoins

prob. not a scam, but they will  release them when it's not worth mining anymore :|

hmm there's also http://coin2pal.uphero.com

has anyone tried it?

Beware that coinvisitor is a scam!
They don't pay. Clicked their ads, submitted withdrawal request, and almost a week passed without coins

u should remove it from the list or make a note that it's a scam site