You could easily earn 1 bitcoin in a year from this forum. Create a few accounts and join a signature campaign then sell them or something. You could also try sell goods/items you have that you don't need any more
He doesn't need to create more than 1 account to just earn 1 bitcoin a year because if he has member or full member rank account it will be enough to earn that amount. But signature campaign is just for a short time so it's not the best way to use as primary source of 1 btc.