Let's compare Bitcointalk and the webmaster alexa rank.
Bitcointalk:
Worldwide - #7237.RU - #2665.
ArmadaBoard:
Worldwide - #32008
RU - #2582.
Bitcointalk have a higher worldwide rank than ArmadaBoard. However, ArmadaBoard have better rank in Alexa RU.
Let's take the average advertising bid per slot Bitcointalk receive form
Advertise on this forum - Round 164. (2 + 1.8 + (3 * 1.8) + 1.75 + (3 * 1.70))/9 = 1.78 BTC (750 USD) for a slot in a nine rotating advertising space.
We ... the
poor (signature campaign) users, earns way lesser than 750 USD - probably around 50 USD per month for an average member here. So, how can you expect your signature space to be worth a hundred dollar? To be honest, you cannot determine a signature value based on a forums revenue.
* also, in order to earn that 50 USD, we will need to posts on Bitcoin almost everyday.