It's one of the biggest crypto exchanges now, having a vote what tokens / projects it should support is probably important for many whales. I could imagine that also old, centralised exchanges want to have something to say when it comes to uniswap development.
On the other hand CRV token from curve defi platform went to dust after initial pump. But they didn't have $1.6B daily volume.
RE: Claiming My $2,800 Stimulus Check From Uniswap