I have about 150 games in the backlog that I buy in sales to play later, when I don't like them after 30 minutes I just refund them. Steam has been pretty good with this, doesn't matter if I bought it months before, they will still refund them.
I guess the demos would be better for Steam as they don't lose credit card fees.
I guess the demos would be better for Steam as they don't lose credit card fees.