The paypal system has some restrictions in Russia - often it is impossible to recieve money and to even operate it. We use webmoney or yandex money instead of Paypal. Bitcion is not popular in Russia either. Webmoney is better for me, as I can pay for this site's hosting and domain name. Some days ago I tried to put a Webmoney button on the site, but it generated a strange glitch in the "new reply" boxes. So I removed it.