Actually, if you wanna say mathematically, then, the higher the odds, the higher is the edge for the bookmaker.
I do parlay just for fun, or if I can get higher odds betting parlay. For example, bet365 bonus for parlay.
For parlay, the more leg you add the more edge for the bookmaker, for example. Odds of 1.91 and 1.91.
That's around 4.5% for the bookmaker.
But, say I wanna bet OKC, SAS, LAL on point spread.
I would do better parlaying three of them. Because of the bonus from bet365.com
However, if the parlay is not just for fun, then you have to do proper staking.
Because with parlay, the chance of winning is lower.
But everyone is to their own, theyhave their own way. And I doubt that what are they doing are going to affect my life.

I have my own. You have your own view.
Cheers,