Jake
I'm not sure I understand.
You want to advance them miles so the can get two tickets - cost $2,500
You want them to rerun the miles to you later for tickets - cost. $2,500
FT ers present you with an alternative:
You use the miles to get tickets for them - cost $0
They use miles later to get you tickets - cost $0
Same results total savings of $5,000
Good deal for all involved. Understand?