and starts earning with signature campaigns:)
Sorry, what amount in $ is possible to make with this in 12 Monts?
It largely depends on how much you're going to be active in the forum.
Best to look here
https://bitcointalk.org/index.php?board=197.0 find posts with 'Signature Campaign' in the title and see which one suits you.
Then, it's easy to calculate how much I can earn.