How do YOU play rebuys?

[two_dogs]

First live STT for me it was a 30+5 rebuy pot-limit.
You could buy t500 for $30 or t1000 for $60 and rebuy for the first hour.
Blind start at 10/20 and double every 20 mins till the first hour then they go to 100/200 and the rebuy ends.
I got t500(probably not a good idea) and since I was coming in absolutely cold I played extremely tight till I could see what it was gonna be like. It was as expected pretty loose/ aggressive early. I caught pocket queens and doubled up early and didn't need to rebuy and didn't get much else to play till after the rebuy.
The question I have is is it worth loosening up and gambling early in rebuys? If so or not so for that matter wha is your rationale?
Thanks