Coming to the topic, whats Ognasty's 1/2 BTC suggestion by the way? Didn't have the time to go through the whole thread, but it seems well accepted.
tl;dr pay 2
BTC to get a special rank that can have a signature, everyone else either has super stripped down signature or none.
Ah, seems quite harsh and might lead to most of the users leaving. While it looks good on paper, it will mean loss of traffic and consequently ad revenue for the forum.
Lets face it, more than 60% of the signed users are here for the signature payments and nearly 30% of the remaining are the FUD/Ad(KNC , the advertisement posts about some bullshit and the price drop FUD) spam, which feed off the 60% of the traffic which the sig campaigns bring. With the first gone, the latter will slowly disappear too, which might seem good at first but will most certainly either mean that this will result in either a notable sig-spam free community or a user devoid forum
Edit: For the record I get paid a fixed amount(like say Blazed) regardless of whether I post or not