I wouldn't care if you had a hundred accounts making a hundred posts a day each, just as long as you were making worthwhile contributions. The issue is, people have numerous accounts just to spam with as quickly as possible to milk bounties and signature campaigns for all they're worth, and that's when it become an issue because the quality of the forum drops drastically and exponentially as more and more people sign up every day with multiple accounts just to bleed bounties. When you can get paid for regurgitating the same one line shitpost over your half a dozen accounts why would people bother writing anything more? The longer somebody spends on one post they less they earn so it's inefficient for them to actually make quality contributions.
I think there is some overlapping between the rules. It says that having multiple accounts is allowed but accounts sales are discouraged. But what happens in case of permanent ban. I have read replies that a member is not allowed to open a new account in that case. But what happens if a member got his account banned and already had other accounts created before the ban ?
It's meant to be that they are all banned and the others will in fact be ban evading if still used, but there's nobody looking out for ban evasion so people can just freely evade away on their hundred alt accounts. Even users who are caught abusing the forum en mass with hundreds if not thousands of bots are never looked into so it's like playing whack-a-mole. You might catch a handful of accounts but there could be thousands more that are still posting away.