Hi, I'm the author. Usually, I provide links to the new terms mentioned in the article so that interested people can click and learn more. I have changed the link color from blue to dark gray. Would it help? Or are there just too many links in general?

If possible, you shouldn't rely on colour alone for important cues. You could try underlining them, since that's often the expected behaviour for URLs anyhow.

The grey color made them a bit more readable, but it looks like either fonts are broken (the text is horizontally doubling!) or it's some font shadow CSS property poorly chosen.

The fact that you don't see the problem immediately makes me also guess if it's just rendering that way only on mobiles or in my browser*os (Cromite on Android) or maybe a result of some resource (js/CSS/woff) getting blocked by the built in adblocker or something.

Several of them seem to be 404ing for me

Broken links should be fixed right now. Sorry about that.