The reason behind all this is a big misunderstanding or a fight? between revbux admin and the script brokers called SWS (seamlesswebsolutions.com).
It's hard to know exactly what happend but in the end a few files at revbux were erased/replaced by sws without letting revbux admin knowing about it.
Revbux is a ptc site that have been online paying to everyone for more than 6 month! Let's hope that it will be back in a few hours fully working like it says on the site when you try to connect to www.revbux.com