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If I put a number I would only be guessing.
If I go by the last test run they did it was a tiered structure for prizes

But still, any number, what will be the total number of beneficiaries even with a tiered structure...10, 20, 50??? (Tentative)

Though this could be seriously speculative to say a number
for reference the last quest had 10 winners

so this time round they could follow the same model or tweak it who can say.
Though if I jog my mind with the info I have there has been the talk of giving out nfts too.
So till they put it in print they have things under wraps