EZY's don't use a rivet in the proper sense, they run a pin that is flared at one end.
I've never had the flare fail, or the pin fail, but have had them wobble after major abuse (hammering them out of a tree-left in too long). Junk anything that doesn't operate as it did new. Like I said before, I might have had to trash 3, after using the snot out of them, then having to abuse them in removal.
I run 3-5 stands, move them often, have for over two decades.
Other folding steps? Seen them fail, also seen problems with rod type steps (rotate under load even when seated fully).
Won't climb a tree with cheap/bargain steps.
I trust EZY, have for 25 yrs and had zero problems with them.