The whole point of USB mining is not really about profitability. Its about enabling people that dont have money to buy expensive GPUs/ASICs to just use a spare USB port on their computer and be up and running with just 40 bucks.
Will a 40 dollar investment make you thousands? Probably not, but the whole point is to bring new people into the ecosystem. They learn what cryptos are about, and earn a little bit of crypto while they are at it.
Most people that buy my USB miners dont use them themselves, they gift them to people that would never think about crypto, but its a fun and engaging way to get them into the ecosystem.
This is definitely correct but i do still believe that there are ones who do plan to purchase up these USB's for the sake
of making money with less money that they do pull out of their pockets/wallets.This is really just good for educational
purposes only but profitability? Then its a far cry from reality.

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Create your own thread and you might get some people on which you do seek of.