That's not a potential solution probably, otherwise, theymos would do it long ago. I doubt 10% of the current active people/activity would be active once sig is disable.
10%? Drop that to 1% and you might have something close to the truth.
Most users join for bounties/signature campaigns and spread their spam across the forum. Is it more important to have a
big community or a community that
actually cares about bitcoin? How many of these users have
bought bitcoin? How many of these users
have 1
BTC? I doubt it's a high number. I doubt the retention time of their received bitcoin exceeds a month.
These users are spamming because they see the forum as a "job"... something that brings them money in return for low-effort posts. That's not how the forum should be. Especially since we have the name
Bitcointalk, having altcoin-promoting users taint every section of the forum with trash is not what we want.