We had the bounty board, and we also have had the #ad sections on twitch. "which brought brands and streamers together"

Since ad revenue is not a constant, allow streamers to curate the ad's and brands they would like to show on there channel. Some of the community likes X and the other likes Y. I'm not here to tell you or the creators not to "get that bag" but let the channels curate the exp. If a streamer want's to "get that bag" and doesn't see a moral conflict with a sponsor/ad they can choose to take that ad, if they do have a moral or obligation that does not allow for it they should be allowed to opt out.

Something simple like a checklist of brands and ad types, they can allow or disallow from. then a sub section to target specific ads they don't like on the channel.

This means the slots streamers show on populated channels value would go up, while allowing lower pop streamers/creators to be able to curate the exp of the small community.

this also might help the game categories disparity, like some games/categories don't align with creators but the same is true in the opposite direction. If a creator has the ability to decide what the community is exposed to in ads, while also allowing for ad's to show a number value this should increase the value of the ad time.

If a fast food companies time per view is lower than a local targeted ad
they should have the ability to choose, and vise versa.
if worldwide brand pay a worldwide price the creators should be able to choose that.

If a streamer has a community that is built on a core foundation, they should not have to shake that foundation to keep using the platform.

Personally i think Twitch is going to have a major problem going forward with ad's and the revenue they generate for both the creator and the platform.
If the streamers can't control the ad's or the amount they get from the ads it pushes the streamers and communities away.

Like nobody likes ads but they are a necessary evil, but i think people who use the platform should be able to control somewhat what is pushed in that necessary evil.

Another problem that i have seen on occasion is when a channel/event/creator has a deal in place with a brand or company and then in the ad cycle is direct competition. If AI is checking ad reads and chat gets into a conversation about the ad that was played during that segment, unless i am mistaken the ai might flag it. this is just a wild worry as i don't know what the ad read check does tbh.

but to summarize i think just giving creators a "catalog" of ads/rev and what they are ok with "pushing" on there channel is something that should be looked into. from a average joe standpoint i also think you could create an ad bounty system where you are the person passing the information between the two different clients.

Example:
fast food : check
politics : empty
Sales : check
Gambling : empty
etc.

Just give the creators the power to decide if the small amount of money they get is worth the message, put the power back in the creators hands.