This is a scam.

People tried doing this back in 2011 or so to cheat pools and this is why most pools send a special hash which if a block is actually found will credit the pool AND NOT the individual miner.

You get a hash sent from the pool where you generate your nonces and if you find one with a difficulty high enough, which results in a block, you CANNOT send that hash yourself to the network because it contains the info of the pool which will get credit for finding the block.

This is simply not possible and it seems people are already about to get scammed.