[aikah]

Airbnb,Uber,Kickstarter... shift all the risk on users/owners/renters/drivers/backers.

That's what make their business model very profitable.

Very low risk,they are not providing any real service but connecting 2 people,while still taking a good chunk of each transaction. "It's just a market place,just like an ad in a newspaper",at least,that's what they say.

So their business is not illegal per say.Only those who actually provide the real service face risks.