It said in the video that you can choose what the button puchases. So, you can switch as much as you want. It may be a barrier to using something other than ama

It said in the video that you can choose what the button puchases. So, you can switch as much as you want. It may be a barrier to using something other than amazon, but you could make time to check to see if there are better deals and then switch the API call.