Anyway, I absolutely love this idea! I signed up and am poking around now. I think I already like this more than Benzinga, Stocktwits, SeekingAlpha, you-name-it.
Here's my reasoning: if someone just invented a new icon (created it from scratch and gave it a meaning), they should be aware that majority of their users will not understand the meaning of the icon, at least not at first.
Historical icons, such as a floppy disk or a cogwheel, are fair game. Creating new icons is dangerous territory, especially if you are hoping for your users to focus on the content, rather than getting familiar with your UI.
What do you think the following two icons (taken from utradea example) represent:
* A lightbulb with a dollar sign
* A deck of cards
Having to hover (which may or may not work on mobile), and actually clicking the icons and observing what happens, is not a good recipe for good UX. To read more about actual authority on UX, I recommend reading about Jakob Nielsen's 10 general principles[1] for interaction design.
[1] https://www.nngroup.com/articles/ten-usability-heuristics/
I'm continually triggered by this horrible pattern that frustrates me and wastes my time.
In turn, I think it is arrogant of UI designers to assume that everybody will automatically understand what their icons mean, and that it's worth my time to repeatedly hover over them to get to things they should want me to find.