This isn't just a postponement...its an indefinite one which means there are serious issues. I am sure no foreign players expressed support except for county 2nd XI guys and their equivalents in other countries. But even then, who would risk serious injury or death for just $50,000 dollars or so, and thats IF the PSL pays up. SLPL, BPL and IPL have payment issues, so its impossible to expect PSL to be on top of things.
This doesn't mean the PSL won't happen, but right now it looks likely that it will never get off the ground and even if it does will most likely fizzle out after the first season.