BUT, is it positive EV? To me, looks like it’s a action junkies crack at the poker table.
Yeah it usually annoys me...I sit down to play 1/2, if I wanted to play 2/4 I'd play it. Annoying when I sit with $200 at 1/2 and someone keeps straddling...now an open over his straddle is $10 or more and it fucks up my 3 bet game cause you're investing like 15% of your stack so it's harder to 3 bet light preflop. And my SPR gets too low cause pots are artificially bloated, so it's harder to c-bet or bluff postflop. Changes the whole dynamic of the game.
If someone wants everyone to straddle every hand I feel like he should just move up. Don't force the table into higher stakes.
But most likely people do it cause poker gets boring, not as some well-calculated EV play.