Actually that's still the 3rd lowest thing you can win after the BTTC and SHIB. For me, 10 TRX (about 2.50$) is the highest I have ever got still, I think even 2 times I got that. But considering it was in hundreds of spins, and the rest is pretty much always 0.01$ or less it's not really worth talking about it.
Yet, it's a free spin of course. By the way, not sure if you guys ever saw it but betfury also has this:
https://betfury.com/boxes/all

0.01$ in btc every hour or so which amounts to 0.00000224 btc in "daily profit". 

I found this one after using the site for months.  More guaranteed return than the free spin for sure.