How the heck do users even post with that many accounts? They have to be posting in the same threads and answering each other. I barely post on my 1 account, couldn't imagine the hell it would be to try making quotas weekly on 10+ accounts.
Well, recently he only had the 3 active ones in Chipmixer campaign and I think only 2 of those would approach the full 50-post quota so as DaveF pointed out doing 100-120 posts per week is possible, perhaps even at a reasonable level of quality. I haven't seen them talking to each other and I'm too busy to check now but I wouldn't be surprised if he had a plan as to which account was used on which boards/threads. OTOH, reviving one of the other accounts is what triggered the exposé so you could excessive greed killed the farm.