Most of the listed project aren't that well known in my opinion so unless you dig really far into the depth of defi projects you won't encounter these project but it's still a good precaution for those interested in defi project regardless.
as I see most of them are following the path of already popular defi project even trying to imitate, if they publish code in github i guess they all just copied the already existing code from other well known project and just did minor edit lo. people should stay away from this kind of scam for real.