That is a great idea.Rather than ask for people to exchange subs, I found something that actually works. I'm looking for channels in the travel niche to do an end-screen exchange with me. The algorithm actually likes it and if you look at the little Tubebubby checklist one of those is creator recommended. So, you can get authority from this.
Anyone with a travel channel, give me a shoutout and we can see if our mutual channels are a good match.