I guess I’m confused here.
You say …
“25/50 blinds, 7000 starting stack.
1st bust out hand:
MP1 raises to 150, I call with T8o in CO, BB calls
Flop comes: A79 rainbow
BB jams ~7000, MP calls, I call (with open ended nut straight and the right pot odds to call?)”
So after the flop there should be 475 in the pot. BB jams 7000 so now there is 7475 in the pot and it is 7000 for you to call. So you are getting barely over 1:1 on a call, which means, I think, you should be around 50% or better to make your hand if you want to make a call profitable. Doesn’t look to me like you are close to that with an open-ender.
What have I missed?