One bettor won more than a half-million dollars by hitting an insane parlay during Championship Sunday in the NFL. The lucky winner turned their $20 site credit on FanDuel into $579,000 by correctly guessing the winners and exact score of both conference championship games. There's 55 555. There's just 55 555.

A +1.5 spread is commonly seen in baseball betting, the standard runline  for MLB. This spread means the underdog must win outright or lose by exactly one run to cover the spread. Alternatively, a -1.5 spread means that the favorite must win by at least two runs. Many baseball games are decided by fewer than two runs.

Yes, Martingale betting systems are permitted when you play casino games online. There's no reason why it wouldn't be prohibited. In the long term, the casinos will always take money off players, but those prepared to practice Martingale for short-term bursts could succeed.

Double bets are a great way to maximise your profit potential on two outcomes that you would have probably wagered on anyway. In combining your two single bets, you increase your risk but also your odds.