Tourney Advice / NL Unlim. Rebuys / Strategy??

[Dr. Fu Man Chu]

What is the best strategy for these low cost ($20 to $50) NL
tournaments with unlimited rebuys for the first several rounds?

There seem to be a lot of all-ins and a lot of calling all-ins.

Is it a coin tossing contest? How to adjust starting hand
requirements?

Thanks in advance for any insights.