I've been playing a lot of the keepable upgrade mini-games lately, and eventually I started to notice a pattern. The favor quoins in certain games only applied to certain giants. In case anyone else hadn't realized this either, I thought I'd provide the list:
Abysmal Thrill - [All Giants]
Arbor Hollow - [None]
Beam Me Down - Alph
Bippity Bob - Mab
Cloud Flight - Alph
Cloud Rings - Pot
Mountain Scaling - Zille
Radial Heights - Cosma
Sky Plunge - [None]
Slip 'N Slide - Cosma
Starlit Night - Cosma
Hope you've found this helpful! Please let me know if I'm wrong anywhere and I'll fix the chart.