Add free products based on subtotal amount but only once

Dear Advanced Dynamic Pricing,

I would like to add a free product to cart after reaching a certain amount (let’s say 100). I used the “Add free products based on subtotal amount” example and it is working but my problem is I only want to add only 1 free product. If the customer reaches 200 he will get 2 free product, over 300 he will get 3 free products etc. How can I limit the free products to only one?

I tried setting the “can be applie to” to “once” but it didn’t solve the problem.

Thank you in advance