What happens to iOS Apps when you turn OFF Family Sharing?

I have Family Sharing turned on currently, but no longer wish all my family's purchases to come from the one credit card.

As some iOS apps have been bought for the benefit of the whole family, what happens to these apps if I were to turn off the Family Sharing feature?

I note that any In-App Purchases will not be shared (which is fine), but:

1. Will the apps continue to reside on all the other people's phones and be updatable etc?


2. Presuming 1. to be "Yes", what happens if in the future they remove it from their phone, but then want it back again?


3. Does it show as purchased on their accounts?


4. If the answer to 3 is "no", would turning Family Sharing back on temporarily solve this?

Thanks in advance.