I'll add my 2 cents

The price for a roll is too high - the rewards for a roll are too low

As such I would never buy kobans

I'm happy to support games I like, and if say on Black Friday they put out a $10 10xspin I would - in part as this gives me a way to support the game in part thats a great deal

If once or twice a month or once per event you get a special 100 gold for one epic spin - I'd do it sometimes....

I think some of us would like a cheaper but meaningful way to show our support