Here's the full explaination of the teaser bet.
https://www.investopedia.com/teaser-bet-5217718I understand that some aren't familiar with it since not every sportsbook has teaser bets. If I recall correctly, I made this kind of bet before when Nitrogen Sports was still popular. However, with the popular casinos now, I don't see this option. Maybe it's available on fiat bookies, but it's still worth discussing here.
I read the explanation (unfortunately the examples are not given in football) but I don’t understand how this is fundamentally different from betting with a handicap (positive or negative)?
In general, I did not see anything new and interesting (in my opinion, something complicated cannot be interesting). The simple rule "reduce the risk - reduce the gain" and vice versa, works here as everywhere else.