That was my question earlier, are the hacks additional files in addition to the plain vanilla install ... or do those patches replace actual Apple, ATI, Nvidia, etc. files.
If they are selling a hacked OS, they aren't just selling a plain vanilla install using the EFI bootloader -- but selling a cracked OS for PROFIT (since they are charging $150 for a hacked version of a $129 SW package onto the machine.)
That gets it out of the realm of simple EULA and license violations and puts them square into copyright and possible piracy violations.
Would it be illegal to sell the modification that enables OS X to run on a non-Mac system? It seems like that is what the $21 "charge" is for.