We need to make that more clear on the site, we don't entend the volunteers to get paid, but rather rewarded with discounts, early access, and recognition from the communities they help.
As an aside, you may also want to make it more clear why your service works better than existing croudsourced support, such as community forums. I think you can tell a pretty compelling story there: less effort to maintain the community resources (since you do the work for them) and phone support rather than forums/lists/etc. The idea of talking to an expert on the phone often seems far more appealing than sending off a mail or a forum post, at least for certain types of questions.