It would not add money to their coffers though as each and every Byte that gets processed causes money to be burned for things like; electricity, manpower, internet usage, and several other things.
Oh and Paul saying that your spelling is getting worse because no one is really answering your question is bull shit and I will call you on it since no one else has. the word you are trying to spell is PRIVATE.
The reason W3C hasn't implemented a private forum feature is because:
1 They have been so generous as to give us World Forums.
2 They have given us our very own chat spaces.
3 The quality of these forums are not very good in the fact that they do not keep track of posts that you have read and the ones that you need to read.
4 It holds a very high possibility that these forums are not able to have a private feature.
I hope that answers your question Paul, now please improve your spelling.
With Regards,
Dragoon