Infield Fly Rule

[Dakota]

The ONLY thing the infield fly does (assuming the ball remains fair, which yours didn't) is to remove the force by declaring the BR out.

Everything else remains the same as with any other fly ball.

Excerpt from ASA Rule 1 - INFIELD FLY:
"The ball is live and runners may advance at the risk of the ball being caught. The runners can tag up and advance once the batted ball is touched (prior to catching), the same as on any fly ball. If a declared infield fly becomes a foul ball, it is treated the same as any foul."

Notice: the same as on any fly ball... the same as any foul.

Same - same.

The thing about advancing once the ball is touched only applies "prior to catching" -- i.e. if the ball is caught eventually. Again, same as on any fly ball.

The mere call of infield fly does not anchor the runners to the base, but by removing the force, it allows them to stay on the base even if the ball is not caught.