I am a little confused about how changelly gives us the ability to buy bitcoins without an ID? Does this mean they are using someone like localbitcoins?
Howcome they dont need any id to buy and sell BTC? Are their rates much higher? Why does almost everyone use bitfinex to trade bitcoins and not something like changelly?
People don't use Changelly because their rate for USD -> Crypto sucks.
Right now, 1 BTC = $6761 at Changelly. This is $900 dollars more expensive than if you buy with Coinbase or Kraken. Also, Changelly only accepts Credit Card, while most exchanges will accept wire transfers or bank deposits.
In other words what does changelly actually do?
There is no advtanges AFAIK. People tend to use them for Crypto <-> Crypto exchanges.