Gnoming attempts for matched betting don't tend to be too sophisticated. The player will ask their friend or family if they can open an account for them. But rather than creating every account on the loved one's phone, computer or tablet, the multi accounting fraudster is more likely to do it all from one device.
The law is not the same for both parties in many states. In California, it is not illegal to make a bet, but it is illegal to take a bet, or operate as a bookie under California Penal Code Section 337(a).
A System bet allows players to bet on multiple events and outcomes, removing the all or nothing approach to Parlay Bets. That means part of your System Bet can win even if others lose. The trade-off is that System Bets come at a greater expense because they increase the total number of picks in your bet.
The main difference between system bets and multi (parlay) bets is that you can win a system bet even if not all your picks are correct. For example, in the case of a 2/3 system bet, you win even if only two of your three predictions turn out to be correct.