In my capacity as a TA at Experts Exchange, I'll often view questions in my Topic Zones that I may not be able to help with, or don't participate in questions because I can see that other experts have already given the advice that I'd give.
In the latter case, I'll often mark the other experts' comments by clicking the recently made available (beta) function [This is Helpful] button.
However, what I'm frequently seeing are comments by Experts in questions saying that they agree with a previous Experts comment and then adding their own comment, yet do not mark the previous expert's comments as helpful.
I'm curious why not?
The addition of those buttons is to encourage collaboration between experts and giving you the ability to recognise other experts contributions as being helpful, thus rewarding them with a few points. Marking another expert's comment as Helpful does not take anything away from your own comments or from being marked as the solution by askers, so please do consider using them.
If we all work together to help askers out and reward each other for our contributions, it can only serve to increase the great community spirit of Experts Exchange and help make the place an even friendlier and place for people to participate in.
This has been a community service announcement :-)