How should cheap rebuys affect my play?

[flopmonkey]

A local casino runs a weekly 88-player tournament where the buy-in structure is like this:

- $60 to buy in - gets you 500 chips
- in the first 20 minutes you can rebuy for $20 if you have 500 chips or less - gets you 500 more chips
- in the next 20 minutes you can rebuy for $20 if you have 1000 chips or less - gets you 500 more chips
- in the next 20 minutes you can rebuy for $20 if you have less than 1500 chips - gets you 500 more chips
- at the end of the first hour you can get an add-on of 1000 chips for $30

I guess this leaves me with a few questions:

I can rebuy right at the start so I have 1000 chips -- this must be a good idea, right?

Should I play like crazy trying to build a big lead since rebuys are so much cheaper that the first 500 chips?

Any advice is much appreciated.

[Wetdog]

How many rebuys per period are allowed?

What are the others doing? Are they rebuying liberally in the 2nd and 3rd periods, i.e. rebuying in the 2nd with <900, multi rebuying in the 2nd with <100, etc?

[flopmonkey]

You are allowed unlimited rebuys per period. Many of the players that I observed were playing very wild and rebuying a lot in the first 3 levels.