You realise a few things though right?

1) Hashcows is not a new pool, its one of the most established scrypt multipools out there.
2) They only need to buy enough 365Coin to cover the BTC that would have otherwise been paid out to the users who have requested 365Coin payouts instead. This isn't going to be a vast sum right now, there are only a few people taking 365Coin instead of BTC. There will be no problems buying this 365Coin in with current levels of market liquidity.
3) Scrypt alts you mined are traded according to Hashcows trading strategy, this doesn't change whether you take BTC, 365, BC or any other coin for that matter. The only time Hashcows trading strategy is irrelevant is when you are keeping the alts for yourself, which is one of the unique features of this particular multipool. Their trading strategy is designed to maximise your ultimate final payout, whether thats BTC or anything else.
4) They have no reason for interest in pumping or dumping 365Coin. They just pay out in the currency you have chosen.

I think you're looking for conspiracy or problems where there are none.