None of the account farmers could afford to pay $200
They can, because they've been account farming and bumming off signature and bounty campaigns.
Any threads to do with changing how one ranks up should be simply dismissed. The only reason for creating those is to make it more accessible for those to participate in signature campaigns, which is not what a forum (a hub for discussion) is designed for.
What would be the difference between taking money from them and then letting them to rank up and post, and not taking any money from them and letting them rank up to a certain point and post free of charge?
Difference is taking the money, what would be the reaction of an account seller to this suggestion? it would be to dismiss it because $200 per account or any amount per account would hurt their business. are you selling accounts?