No, those mods weren't put in place by Reddit, they were hired a while ago by the top mods, some of who got banned thus making those the top mods. Reddit admins added zero mods to the t_d.
No. The lower level mods were forced in by the Reddit admin a while back. There were warnings about these sock mods long ago. The subsequent banning of the top mods effectively put these sock mods in control.
That link doesn't say anything about hiring, and doesn't have any evidence on the top mods paid to "hired" the lower level mods. As for the sleeper mods being added by force, there were definitely warnings about them before, but then the whole sub is wiped out now. Very convenient to get rid of all the evidence.