We should get a refund token back if we buy that champion in the same currency again.

Well, this can also affect skins but there's a new crafting system coming and I think it allows to do something with your owned skins.

For example.

1. You bought Kalista month ago
2. You refuned Kalista because you thought kiting would be easy af
3. Month has passed and you're very sad about refunding Kalista, because you realized how good she is. 4.You hear Riot has a new refund policy 5.Buy Kalista again and get refund token back so you can refund that Fiora who you will buy just a month later again.

I mean what downsides does this have, maybe limit this by once a week or once a month.

(I'm really sad about wasting my refunds on Kalista and AhrI)