I was also quite supprised to read so much negativ feedback here. If you are regularely listening to letstalkbitcoin and you don't think the whole show is in on it, you hardly get the impression of this beein a scam.
What do you base your claims on except your gut feeling?
If you watch the price of pts you will see it didn't explode after the ags donations were opened at 1.1.14, but it constantly dropped from above 20$ down to 10$ until it started recovering recently.
In times where shit like mtgox is going on people see value in the idea of a distributed exchange and similiar projects and they put their funds into it. Also the pts are not taken from the market, but Invictus very actively uses them to develop their software.