[spir]

  To improve this, the broker can throw out the best
  performing clients, since they might genuinely
  know what they’re doing.

This practice is pervasive in sports betting. It's a common practice to ban winners, especially in the US and UK.

https://augur.net is an Ethereum-based betting market that will help traders/bettors avoid these kinds of malicious practices. Augur v2 is being developed now, you can expect it to be Really Cool by about April 2020. Millions of dollars will be wagered on Augur for the 2020 election.

[Drdrdrq]

Betting could very well be the killer feature for Ethereum.

[ackbar03]

So far betting seems to be the ONLY feature for all things blockchain. In China quite a few of my friends went to make games on the blockchain during the wave of cryptocurrency mania. That didn't work out so they then went on to make (illegal) gambling games on the blockchain, although that didn't really workout quite as well either (apparently something to do with generating random numbers on the blockchain)

[thefringthing]

I worked on a Bitcoin sports betting site. Been there, done that.