In terms of bang for the buck, I’d absolutely agree. It’s only when a company fully depends on the income of a single client, or closely aligned few, that this becomes a question.

It’s worth remembering a lot of these megacorps do employ people directly to work on FOSS projects. Here’s a quick and lazy example involving AWS
https://redis.com/blog/redis-core-team-update/ but Red Hat and others do the same.

I’m not a fan, and it feels almost as if by employing and embedding people in these projects they look to exert control over them. Realistically, I don’t see that as any different than if they were paying money directly for the same control. Except this way FOSS still has benefits after the license change.

You mentioned you have an Asus router. Which one? Why not move to hosting your stuff on the router? https://www.snbforums.com/forums/asuswrt-merlin.42/ Sure it doesn’t completely solve the issue but in my experience it’s incredibly stable, and more so people expect to restart the router if the Internet isn’t working which simplifies things too. Also beneficial is that you can give different clients different DNS servers comfortably.

Specifically, check out https://diversion.ch/ for dns blocking but its capable of a lot more.