I contracted out the website, and although it isn't to my liking (doesn't look at all good on mobile), it just needed to exist to facilitate user signups. Our actual work was done in person at the show, so the website wasn't going to turn off anyone that was interested since they already knew what it was before going to it.

The eventual website will be more of a web application akin to twitter, instead of a signup landing page. We've just prioritized releasing the actual extension ahead of getting the website done, since the probability of an organic signup was next to nothing.

same here. in principle, one can mix and match serif and sans-serif fonts as deemed fitting, but this here seems to be a mistake. the designers wanted to use a font named Arvo, but failed to include it via @font-face. thus, the browser falls back to the default serif font.

Maybe I'm missing it, but they only seem to be using serif fonts as headers. That's totally legitimate, although their choice of serifs is horrible.