Free spins wrong value?

Got a weird one, and not sure if it’s just me being unlucky or if there’s something funky going on. I got a batch of free spins from a recent promotion. It said the spins were supposed to be worth $0.50 each, but when I checked the stake size in the slot, they all went off at $0.10. Tried a few more and it stayed the same. Even cashed out a little and the win amounts seem based on the lower value.

Is this some kind of glitch, or are these promos sometimes sneaky like that? The T&Cs were vague at best, and honestly, I’ve had enough cold tea for the day to not want to argue with live chat if I don’t have to. Has anyone seen something like this with their free spins lately or am I just the beta tester for busted bonuses?