What does Reddit's core functionality cost? They have annual revenue of half a billion dollars. Tell me that you can't use that money to run a text distribution infrastructure.

I doubt Slashdot in its day cost half a million dollars to run.

The fact that I subscribe to r/woodworking, r/diy, etc, is really useful for targeting but I never see relevant ads.

I’ve literally given Reddit a big list of my interests and the asked to be served content, and the ads are almost completely unrelated.

Good thing nobody is asking for that.