I think the timebank should be comperable to the limits being played. Freerolls therefore should have a very short time alotment. Alot of sites in the past used to (and maybe they still do....somewhere) have variable timebanks, with the larger buy-in tourneys having up to 3 minutes to think about a decision. After thinking about it, I would hate to see that priviledge taken away because people were abusing it.