Referring to real services that serve bitcoin and earns bitcoin like Mixers for example
Some services in descending order of profit they make (my own speculation):
- Centralized exchanges like Coinbase, Gemeni, Bittrex, etc.
- Mining hardware manufacturers like Bitmain
- Payment processors like Coinbase and Bitpay
- Gambling sites like Primedice
- Semi-decentralized DEX where they run a server and get paid in trading fees like Bisq
- Semi-decentralized CoinJoin services like the honeypot called Wasabi
- Wallet developers like Electrum running a side-service (TrustedCoin) for their users
Thanks for the insights, also mining pool, hash power marketplace