I heard they keep saying that the forum has enough money and without traffic from the spammers the forum will be better off. Personally I think forum will lose most of it's traffic and people will move on to something else. Only the true bitcoin lovers will stay here.
This forum exploded because many people saw an opportunity to earn. I know of five other forums that will definitely welcome btc and more altcoin signature campaigns. Some high-ranking users here are well-off (maybe) and don't really need the added income but others will move or be more active in other forums.
I see some user here suggesting the removal of signature but still proudly wearing one.