If you are not prepared to rebuy 1 or 2 times then its probably not worth your time entering a rebuy tourney. Rebuys will generally leave you at a disadvantage even if you are as the additional rebuys will rarly even increase the prize money (this is the case at
poker.com). So you have the choice of paying more than $5 to enter a $5 tourney, or just pay $5 and play shortstack from the beginning??
However, rebuy tourneys tend to attract the looserplayers who intend to hustle and love playing with chip leads. So you can kinda get a bead on the type of player if they rebuys 3-4 times initially chances are theyll try to hussle more than your average joe.
online poker companies are making enough monies as it is, if your prize money doesnt increase with the extra buy ins.. play freezeout.