Here's how EP recruits new members. A pervert joins EP and starts a sick group. Perverts searching for sick s*** on the internet find a link to the group on EP. Those sick perverts join EP so they can join the group and be all sick perverts together.
EP encourages this by letting those groups grow, flourish and multiply. Why wouldn't they? It brings more people to the site, more people to read the ads which fund the site.
It doesn't make the site any more pleasant for the decent members who are here for normal reasons. But hey, who cares? Most of us ALREADY LEFT.