At least their latest pack makes it very clear:
This pack is for use with FPS Creator games only. It requires your FPS Creator serial number to install. The license does not permit you to use the media in any application other than FPS Creator.
VERY nicely done low-poly H&Ks BTW in that pack... like the textures. Blitz really needs "game-ready" packs like these too. TGC is doing something right, like getting publicity and offering cheap content. I know that Blitz isn't meant to be "game creator" but that's what most people use it for.
This pack is for use with FPS Creator games only. It requires your FPS Creator serial number to install. The license does not permit you to use the media in any application other than FPS Creator.
VERY nicely done low-poly H&Ks BTW in that pack... like the textures. Blitz really needs "game-ready" packs like these too. TGC is doing something right, like getting publicity and offering cheap content. I know that Blitz isn't meant to be "game creator" but that's what most people use it for.