We have played about 10 sessions of RT now, and things are going well, but get the feeling that the players don't know about all their options since none of them have bought the RT book. There is no chance of powergaming this way, but also much less initiative from the players.
To get more out of the sessions they will have to learn the rules better, so is it OK to make them by the RT book?

. I'm sure most people here agree with me on this one.