Good point, Bob. My First-Up was the Walmart knock-off about 8-10 years ago, and it's still going strong. Up until a few years ago, they did support it with replacement canopies, screens, and side walls, but not frame parts.
Now they seem to have gone with an even flimsier variety and no support. Par for the course at Walmart in my recent experience.
Wish I had bought a spare canopy when they had them. I do store mine separately from the frame to avoid wear against the frame at stress points. It is starting to show some UV degradation, and I noticed some small leaks
along the seams that a sealer should take care of.