Not necessarily. Depends on the EV.
You could run up the promos (-EV for the Sportsbook) until you get banned. House does not win in this case but where is the fun in that?
To answer your rhetorical question, there is a vig (or commission) built into the odds. You’ll rarely see a +100/+100 (I’ve seen it only on superbowl coin flips). You will often see a -108/-112 spread. I’m using binary examples.
Use a site like aceodds to convert moneyline odds to % odds.
That coin flip example comes out to exactly 50/50. No edge there. The -108/-112 will come out to something like 48/48 (4% house edge). And that’s how they make their money… to respond to OP in a productive manner…
Last words: I was obviously TP fkn idiots…to whoever was actually TP on my wagon…please go to school/add a cert/smoke some ayahuasca/get cucked by an uglier man. Y’all need introspection