Theoretically I have a tracker blocker. I have absolutely no problem seeing ads -- it's being tracked around the internet that I don't like. And no, I won't make an exception for your site, even if I do like your content.

It's possible that their ads don't actually do any tracking, in which case they're receiving collateral damage. They seem technical enough, they should be able to figure out why the tracker blockers are blocking their ads and get things fixed (either in the ad code or in the upstream tracker blocker software).

This gets incredibly annoying using Firefox Focus on mobile. Apparently, the blocking and filtering built into the browser by default is enough to make sites thing I'm running an extension and they politely ask me to disable it, but I can't even if I wanted to. There is nothing to disable.

What browser are you using, if it's firefox it might affect it?

You're probably using a DNS ad blocker.