I dont know... but you'll never get as high a bid as the people who are currently paying for signatures. You can get much more from joining one of those threads. Meh, maybe you're doing it for fun, what do i know.
I'm aware I won't get as high of a bid as those but, I rather not support those types of sites. (Gambling)
Hi, I'm selling my signature space. The winning bid will receive their signature for 30 days. I currently don't use the other paid signature campaigns due to the fact I don't support the advertisements. Anyhow, below are the guidelines.
No NSFW sites
No Gambling related sites
Overall must be legal in the US
Bidding starts at 1mBTC/month (.001 BTC) - Bidding ends at 07:36:25 on 12/14/13 Server Time. Extended