$5 monthly subs to access certain areas of the forum might be an incentive - But, I would like to think that the site alone as is would be incentive enough - because although there's other sites similar DS is the only site whose mods and owner actively participate in providing and discussing content. It's not as though they're just sitting back, relying on members to do the heavy lifting while they take in shekels and make rules.
It's also the only site where jews, antifa and other poc are not tolerated beyond what's reasonable - and where jews must wear the Jude Badge - Stormfront, AmRen etal insist that jews be treated as people who are equal to us -- Jews/poc are also not allowed to insult DS members and then hide behind 'free speech' rules/Muh Democracy.
$5/month is cheap for a great news and discussion board where jews can't jew, niggers can't nog, and feminists have to wear virtual dresses and behave themselves like the other DS women. [Perhaps special grants/free passes for indigent Stormers who really cannot afford this amount can be offered]