OT: can't find a thread discussing this - I've been doing opinionplace from time to time to keep my AA miles from expiring - how does the paypal reward compare to miles? Meaning for a regular survey that would have been about 75 miles - how much do they pay? 75 cents?

Edit: I guess I can compare - I just changed my reward structure to paypal and did a short survey about clothing - it was worth $2.25. So probably in the vicinity of 1-2 cents/mile. I think I'll be reverting to the mile awards, I don't do these surveys often enough to make me "rich" and the better value for me is to get few miles here and there to keep my AA account from expiring.