I am humbly against Feiyang. Not everyone gets that amount of computation resources to try out their ideas. A decent amount of daily limits on submissions are helpful.
On the other hand, I agree with @jurgisp and @quang_tran that we should relax the 2-hour limit. I think this makes the competition bias to on-policy algorithms. On-policy algorithms can take advantage of large batches and therefore use less training iterations. But off-policy algorithms usually work with a much smaller batch size and require more training iterations and more time to train.