Throw away cameos, for or against?

[Deadman]

I’ve been working on something and debating whether or not to include a chapter featuring a particular character.

It’s a fandom with multiple spinoffs. I had kinda decided not to include the spinoffs in the story but as I’m planning the last chapter, it felt like it would be fun. To slip it in there just for the reference. Maybe even have two main characters from the spinoffs appear.

Part of the issue is given the situation that’s been presented, I don’t know that everything completely makes sense. Basically, the main characters of the main show become employees at one of the canon businesses in that show. But there aren’t enough employees for a full staff if I’m thinking about it with logic. So if I add these other characters, it would be slightly more plausible that the business could function with the employees that have been established through the cameos.

But I feel like it might come out of left field for these other characters to just suddenly show up.

So are you for or against a throw away cameo in general? Do you prefer when things make more sense or if the story is fun, are you fine with it not making sense?