Totally agree on licenses and transparent pricing in general, but I think you've missed the context here.
If a commercial entity wants to add the core functionality of my product to their offering then there's definitely going to have to be a negotiation first. AGPLv3 wouldn't be appropriate, as the commercial entity's code being open source isn't a material consideration for me.
(The license text I was referring to is here: https://github.com/dependabot/dependabot-core#license. I could hire a lawyer and put a proper, proprietary license on the repo but I'm bootstrapped and don't think it's necessary.)
Especially if you are already giving it away to open source projects -- my bet is most people who see "call me" as a clause will move on, even people you are actually trilled to help.
AGPLv3 would be a decent suggestion, but even your own license wouldn't be bad either.