In games against the house, the house usually ensures that even with mathematically perfect play, that they will still have a margin (though, admittedly, it's a tighter margin than when a bachelor party is drunk and playing blackjack and hitting on 19 because "I'm feeling lucky!").
Most pros play against the other players (i.e. poker, etc.), and the rake is the rake, regardless of that - the old adage, "If you look around the table and can't figure out who the chump is, you're the chump" stands, i.e. you don't have to beat the house, you just have to beat Bob who flew in from Iowa (not intended to insult anyone or anywhere, just more exaggerate the casual player).
No, advantage betting is pretty much only against the houses, not against other players. While people who know the sport and manage to bet misplaced lines can be winning over a season, advantage betting is the only way to reliantly have a positive EV. Casinos and now sport betting apps try to prevent professionals to use this, but with the number of shit you can now bet on, and since you don't have to tie an account to your real identity yet, it is becoming very difficult to catch that, especially if you muddy the water with dumb bets.
Outside of the US where gambling on sports has been the norm for decades, the bookies tend to run square books and just earn spread + commissions. To the point where pvp exchanges have been the dominant destination for betting for 20 years or so.
These article (and others like it recently) just make me think US sports betting operations are operating on antiquated business model.
Yes, this is only because american sports give "line bet" and "prop bets", that anybody can exploit if two apps aren't coordinated. You can do line arbitrage (middling is the easiest, but professionals use props with weird maths and specific knowledge to make a living).
If you only offer to bet on the money line, it makes it way harder for professional gamblers.
A football game in the UK for example has ~60 markets on exchange for a single game with bets on everything from the result, handicaped result (multiple lines), the number of goals, the times of the goals, scorers of goals, half-time results, yellow cards, red cards, number of corners, number of shots at goal, time of first thrown in etc.
All the tech piling into US sports books is British precisely because the British markets (particularly horses, football and tennis, but really everything up to and including political markets) are so much more sophisticated and there's a killing to be made exploiting the rubes in the Wild West.
Really professional gamblers (eg Tony Bloom / Betlizard) are just hedge funds and what we're talking about in this thread is "trying to gain an execution edge".
In games against the house, the house usually ensures that even with mathematically perfect play, that they will still have a margin (though, admittedly, it's a tighter margin than when a bachelor party is drunk and playing blackjack and hitting on 19 because "I'm feeling lucky!").
Most pros play against the other players (i.e. poker, etc.), and the rake is the rake, regardless of that - the old adage, "If you look around the table and can't figure out who the chump is, you're the chump" stands, i.e. you don't have to beat the house, you just have to beat Bob who flew in from Iowa (not intended to insult anyone or anywhere, just more exaggerate the casual player).