Some ICOs are not a scam, but you must be observant in order to determine what ICO is legit or not. You must have prior knowledge before engaging to investments or bounty campaigns to avoid waste of effort and profit.
yes you are right because I myself saw many ICO projects that really materialized and provided benefits for the participants, and knowledge is indeed very important before deciding to get into the world of ICO with experience and high flying hours, it will be easier to assess and choose an ICO which gives profit.