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Token Are created based on users's contributions. But they are not created by the contributions or the contributors. Creation is done by DPoS and the created tokens are distributed based on user's contributions measured by the received upvotes.

In a DPoS system, the token creators tend to be much similar to mining pools than miners. This isn't a perfect allegory. But it's an interesting observation I've come across.

Token Are created based on users's contributions

This is wrong. Tokens are created at a fixed rate by block. They are then distributed to users according to voting.

But they are not created by the contributions or the contributors

Which is why it's not "proof of brain"