My understanding is that when it's a team control foul, the penalty is a change of possession, not free throws awarded.
I learned one this past spring during AAU that I never knew before. My post player went to the block and made contact with her defender and then spun to look for the entry pass. As the defender was trying to push her off the block my player, who was a little stronger, began to move the post defender back a few steps. Typical fighting for position on the block.
She got called for an offensive foul. Why? I asked. The ref said she was guilty of displacing the defender.
I'm like, uh, yeah, because the defender was pushing my player off the block. What's she supposed to do, let herself get moved around?
Well I asked a friend of mine later who is a state basketball official and he said yep, the ref technically had it right. So once post players engage and contact is made, you can hold your position, but you can't displace them.
I never knew that. I always thought that 90% of post play was trying to move the defender around so you can get better position.