I finally gave them the heave-ho. After having my account suspended for the 2nd time in a month, no more. In fact this time when I inquired they said it was a permanent suspension (canned reply). I lost $17 in incentives, but I don't care. I blame their fraud detection software for this, as it seems to automatically flag accounts if there are IP address changes, or some narrow set of parameters based on speed and accuracy.
I put a negative review on Google Play stating the above, calling out Dynata specifically, and found that almost all the recent reviews were just like mine. They must be losing respondents right and left. It's a shame, because I was making pretty good incentives off the app, but good riddance.