This is all nonesense. Only bitcoincash bitcoingold and maybe one or two others gave you anything. The rest are filthy lies and tricks to get people to make mistakes when they claim their so called "free" coin. Most of these coins have no wallet so there is nowhere to import your privatekey.
In fact what you are saying is nonsense. Most of the forks that already happened do have wallets, do have the source code, are fully working and functional. Some of them are already being traded on various exchanges and have deposits and withdrawals enabled. You should first educate yourself on the subject before you ridicule yourself by saying such an uneducated nonsense.