idk about legal status in Austria, but betfair is the largest betting exchange in the world. They make an absolute fortune and a £10k bet is fuck all to them considering they get their % regardless of whether you win or the person taking your bet. It's like worrying about pokerstars giving you your winnings when the're making easy money on the rake. They're not going to dick you about. The worst thing that can happen is they cancel all bets and return any money.

Basically they provide a platform for two people to make a bet against each other, with betfair taking a cut from the winning bet (essentially the rake). They do run their own books, but only idiots will bet against betfair, since the odds are always worse. If you're betting on the exchange, you're betting against other people. The "sportsbook" is their own book. They also have a casino and slots, plus a poker room and bingo. The exchange is where it's at though.

https://www.betfair.com/exchange/plu...et/1.128151441

The price has changed since Trump said he'd accept the result once the electoral college ratify it. You can currently get 1.05 on Biden, so a 5% return (before rake). That means people have taken the odds of 1.07 and 1.06 (or those offering those odds have cancelled their bet before it was taken), and there's nobody left offering those odds. There's currently just over £4.5m of action waiting to be taken at 1.05.

If you're going to bet on sports or politics, this is the place to do it, as you will nearly always get better odds. And if you find you're getting worse odds than a bookmaker is offering, you're printing money by betting against it (lay) on betfair and then betting for it (back) at the bookmakers. So if betting is something you're into, it will definitely be in your interest to learn how betfair works.