Yes, but very, very small amounts. I don't bother with TA, I just presume anything on Poloniex will eventually pump and sit there until it does. I've never made a loss because they're utterly shameless and will literally pump anything. I don't know how long that can last though.

My preference is to get in on the ground floor with something new. There are enough coins being given away for free. If you buy in with small amounts when they're tiny then you might get lucky, if they fail it doesn't really matter.