Well this was the prime purpose of this forum not signature Campaigns . Also merit was mainly introduced to stop spam in this forum. And merit can only motivate people to stop posting shit and not force them . Well theymos had even mentioned that he can easily introduce demerits as well which will basically stop people to post shit .
Also 99 percent of the people come here to enroll in Signature Campaigns just to earn some free coins. And even some managers don't worry about quality much as not all read posts here ! And they just want their company's /website's name to be visible .