Because now that the short manipulation scheme is drawing to a close, they instead don't want people buying and/or holding for long so that they can accumulate on the cheap.
PT of $20 with a price of $2-5? Lots of buyers who don't look under the hood. Buyers that become the main ingredient of a short bonanza.
PT of $5? Not as worthy of buying. And when it breaks $5, it's harder to justify holding onto.
Starting to see the manipulation engine turn, IMO.