Anyone ever use Greyhound's program? Do any of the airport spa chain places have loyalty programs?

There is VIA Preference, the loyalty program of VIA Rail in Canada.

I suggest that the largest unsung bank of loyalty travel points (and possibly value) may be banks' own points programs. They can be more lucrative than co-branded cards.

Then there's manufactured spending, but such techniques can apply across the board, depending on rules to curb them.

Trenitalia? ;)

Alipay in China has a loyalty program. You earn status by using the payment service and in return they give you discounts and cashback on nearly every purchases you make.

I collected points for a few years (cumulatively months of stays) in Rotana hotels. Stopped paying attention when I realized that 3+ months of stays (at least $25,000 in spend) resulted in enough points for almost one night in the cheapest Kuwait Rotana hotel.

Worthless program.

Does anyone know of unique airport loyalty programs? I know Heathrow has one for making purchases in the airport, and Copenhagen has one for free wifi. Any others that provide notable benefits?

https://www.smartertravel.com/2017/0...ards-programs/ and many, many others show up in a simple Google search.

My home airport (MCI) has a parking program for its own lots. Pretty good system: they send you a card which you use to get in and out of the lots, and you earn points for free parking days later. Best part is everything is online: both receipts for the paid days as well as a simple interface to tag your upcoming days as award days. My regular business travel earns enough points to cover all of our leisure trips.

There's also the Parking Spot nearby with its own program. But the airport program is better since I can earn on close-in parking for business trips and redeem on long-term parking a similar distance away as the Parking Spot.