So the shitposters buy 10 Merit with the account they bought, and continue.
The same way they buy it now? All the threads we see like "How can I get merit?" "How can I get high rank in BCT?" are because it's not that easy to buy merit and there are many who are stuck in newbie without moving up in rank. If we thought that way the merit system would never have worked because all shitposters could buy merit and would have no restrictions on getting paid to write crap. When the reality is that it has worked and buying merit is far from being widespread.
Those threads represent people who don't want spending money to spend money for merit/account. If someone have money to buy high-ranked account, it's likely they can spare some money for 10 merit. I don't remember average market price for high-ranked account, but AFAIK for merits it should start from $10/merit.