Why is price growing? I don't see any reason to grow. On their twitter no any signigficant news, mainnet still has not been launched, tokens has no usecase...

Maybe the price of FRM tokens increased because of updates related to FRM Stake and Earn, Ferrum reduced the minimum staking and higher rewards, so many people bought FRM tokens to participate in FRM Stake and Earn.
I see now, so it's not surprising anymore if there is a surge in price increases. I guess, surely people will try it out and want to get more FRM to get more FRM tokens from that program.