I think steam wants their grubby fingers in the cookie jar and would charge HTC and co to host or something like that... Steam is still a business too...
Ofcourse, but do math on having influx of hundred of players even with steam taking that 30% vs 30 on MA what i saw yesterday.
besides there are people who will never play it because of the reasons stated....... not having it on steam is just potential money wasted, because those that would not want, could still play it the normal way from this site, and those that want it, could play it via steam.
Having more options is always better and not negative.
There is a game called 'Town of Salem' it is a f2p game on the main website, but on steam it costs 10$ and people are buying it ! even though its f2p on own website. It currently has 1000 steam players only and that is not counting the players that also play the f2p from website