Rewards token are those which you only need to hold on your wallet and receive dividends just by holding.
there's tax when you buy the token and part of that tax get distributed to the holders.
examples are:
$EGC which you receive BUSD as dividends
$SFM which you receive SFM as dividends
$ALTS which you receive any BSC token of your choose as dividends
If that's what you mean then at first I thought all such projects would die quickly because when the trading volume gets smaller then less dividends will be paid and the project will die, But now it seems different, if the project has a useful product and get a lot of users then there is a possibility of a longer lifespan, you can take a look at Helena tokens.
helena and aufin now be the leading project that give super high APY. investors slowly trust to developers team since they could important action which is add trust from investors. with high trading volume in market , daily return given would not make price dumped, but its price continuesly soar.