Originally Posted by
laurinky
Do you know if BA charges this for their own frequent flyer program?
In a reply above you were given the link to the main thread on the subject. The answer to your question is contained in the wiki of that thread, in fact in one of the first sentences.
Just to be clear, your question is perfectly reasonable; however, it is old news here and it's not worth discussing all over again. This is why some major threads have wikis.
Revenue flights are a different issue---the bottom line is all that matters, so who cares how they get to the total.