[Wrana]

An idea of such sites being announced to all players is good. Of course, it will require cooperation from those who find them. In this case, it's a pity that the current patch doesn't allow sites to be seen by scouts/scrying. Of course, this also goes beyond the mod scope...
As for unique recruits idea, I don't think it has any feasibility. By the time such sites are found and become useful, one more SC just isn't going to cut it. He will be much more useful if site is found at early game, but it probably won't be found at this time. "Lots of gold and resources" probably fall into the same category - they are useful at start, but not so much at lategame, while discount sites are other way around.