Bits to sub
We should be able to use bits to sub. many people might not have money to sub at that moment. and may have bits stashed aside. we should be able to use those bits to sub. It would give you more of a return investment on bits, particularly bits from ads.
People normally buy bits to support/cheer to streamers but why not add a feature to be able to exchange the bits to a subscription (i.e 500 bits for a Tier 1).
This would be able to help people that have the auto bit buy feature or people that want to exchange the bits for a sub.