So why would I want to pay $550 for miles that will have a booking fee on top of them and be more restricted? I wouldn’t. The only way this might make sense is if you are close to having enough to book a trip and need that extra $1,000 miles to get over the hump.
So unless you need a few extra miles to book a trip do what I do and delete these emails. Don’t fall for the trap. Need more evidence and math? Just google "buying air miles". Its not a good deal, It's a trap!