Cause I'd imagine JTss and QJss will call a shove, and worse Kx will def b/c, whereas a spade or A river will kill our action.

The benefit to flatting would be if a spade falls and he bluff shoves it, but I don't think a spade is an ideal card for us anyhow.

I'm not sure how much pure air is c/r, betting turn AND shoving a brick river on this board.