Do you know that there are many tokens that offers nothing but rewards when holding them? They most times ends with ---nomics you hold the tokens you get some altcoins in your wallet every 4hrs or so, what is your view on such projects?
Majority of the tokens created and yet to be created would be worthless on the long run, this strategy you mentioned is just a way to keep investors trusting their money to them in expectation of high reward in future. Investing in projects like this are very risky they are many of them so the chances of them getting dump is very high.
Do not invest just because a project promise you airdrops or burning. The airdrop would obviously be pennies or worthless tokens that they might create themselves and airdrop it to their holders just to fullfil their promise to make more investors to get attracted to the project.