It's really common to sacrifice revenue in a partnership, but it's your choice to do it. If you already have a thriving channel that is generating income, there's no reason to sign over any money unless you're getting value in return.
In terms of what benefit you actually see from partnershps other than being able to monetize gaming videos, there's not that many. Don't expect them to set up collabs for you-you have to do that on your own. And aside from having access to an internal forum within the network, you're pretty much on your own.