DefiPulse is just a page with information about cryptocurrency. It's like calling coinmarketcap.com a scheme. Maybe you should bother to understand what you're looking before laying down your ignorant judgement.

Uniswap solves many problems (trustless cross-asset exchange, liquid markets without market makers, decentralized orderbook problem, decentralized price feeds, etc)

>Compound - it pays interest. But who's paying the interest?

People who want loans in cryptocurrency.