1. Click Invite Friends on whatever you are inviting people to
2. In the dropdown next to the search box, make sure Search All Friends or “Search by name” is selected!
3. Scroll ALL the way down until names stop loading (I found it easy to click the first name and then hold down the spacebar or Page Down button)
4.For PAGES Copy this code:
6. For large friends list, this may utilize all your resources and will cause the page to freeze and be unresponsive. Just wait a few minutes until all the names get selected.