Is it common practice to charge for multitracks after a project is complete?

I was actually wondering about giving the raw tracks. Do you guys bounce your trigger outputs, or do you just give the raw drums without triggers?
 
If I give a band multitracks, I don't leave any of the samples in there, so they wind up with the tracked drums. It's rare that I totally replace something. I don't want to give a band multitracks where I used a Slate sample or another paid sample, and wind up inadvertently giving them "free" samples that I paid for. If it's the case where the drums were totally replaced, I'll just throw the original kit back into the session and give them that.
 
When I used to charge per song instead of by the hour, I would never give anyone the multi's. They didn't pay for the hours it took to record multi's, they purely payed for a mixed/mastered file. Now that I charge by the hour, I look at it more along the lines of they payed for every hour they spent tracking those multi's, excluding the drum replacement, and as Jordon says, just put the original kit back in, but don't give them the sampled/replaced drums because they didn't pay for the samples.