In my practice, rebuy just helped me to play to the final table. May be i have not enough experience but i never got enough prize to get a profit with rebuy.
No, no, I'm sure you have enough of experience. It happens to everyone: if you do couple of rebuys and you take the last paid place - your profit is negative. Again, I think it's a good practice to do rebuys as rarely as possible.
Yep. May be there are some strategies for using rebuys, and, i think, that there are some opportunities to use it cleverly, but when you have several tournaments the same time - there are no time to analyze situation with rebuys. May be if i lost 3 tournaments that moments and have only one with the last table... But it change all my strategy and it never improves the quality of play. At least in my situation.
Right. Playing at many tables you don't even remember where and how many rebuys you made already. It's really frustrating when you finish in the paid places, and then you see that because of all those rebuys your profit is actually negative. I think the optimum is one renbuy max, and one table only.