Each company wants $$$$ to get going and the only way to get it is sell the NEM you raise
The XEM market is way, way too weedy to cope with a wave of ICOs, but of course ICOs drive volume too. It depends though. If there are varying currencies involved there's no reason for anyone to choose XEM over a more liquid one so it'll be squashed flat over and over again.
COMSA concept might be a bad idea for NEM in the long run for the reasons already stated.
It might hurt NEMs credibility if too many ICOs start popping up with empty promises.
Then it could be a really good thing, all to do is just wait and see what happens.