The thing is that POLA pin action doesn't explain a stock trading 4X or 5X its float in one day. Plus, I sort of doubt that the trading involved institutional holders or some of the long-term folks. So what you have is probably 500K or 1M shares getting wash-traded back and forth 20+ times per day.
That's manipulation, albeit perhaps driven by pin action as you indicate.
News 
Market Data 
Discover 
