Proofing - Do I pay before or after I receive the photos for proofing?

It depends.

Scenario:

For the 16 photo package, the photographer can upload up to 22 images for proofing. After they are done editing you can select 16 for free and purchase more if you would like. If you want more than 22 to be uploaded then you need to pay for another photo pack via the shoot link in your confirmation email before the photographer uploads.