tellism

As others have pointed out, it's not a pool. They're a service for connecting people with miners to people who want to mine something. They're a hash reseller. A user bids for mining power and where they want it assigned. Miners post rates they're willing to mine at.

There are other options in Bitcoin land to protect against theft. If the online wallet uses multisig then it requires a signature from yourself before they can take the funds. If they're hacked then the hacker can't spend the coins.