I don't know about microtransactions any more. I don't know if I would spend $60 on a game if they already have microtransactions that cost in the works. Like someone else mentioned, it splits up who can play and it might take some big or important content for me to pay for it. I think the idea of adding content might be cool, but if it costs money, I'm not sure it's worth messing with to me.
I haven't paid for any content downloads and I play games that use them.. Oblivion, GRAW, Halo, Socom