In the chaos patch, only the first version gave 2500+5 ore (so that it would be possible to at least build a Citadel, in order not to lose a construction day if you didn't find resources in the first few days).
It would be more logical to give 5 wood instead, so you could build a market when you're broke...
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Nobody has ever dug for the Grail, and nobody ever will.
That was a CM game :)