The underlying writing issue here is that people will use "very" because the sentence feels too bare and simple without it, so they add "very" (or "really", "extremely", "truly", etc.) as a way to add interest and emphasis. A good example of this is that they have "incomparable" for "very unique". "Unique" and "incomparable" are synonymous, and "very" isn't necessary here at all, but the latter word may have more punch.
You may be right, but even as a non-native speaker I know to use very for emphasis only.
The problem here is, as you can see from the fact that 100% of this thread is pointing out how badly that website works, it completely misses the mark on what it promises to do.
If I wanted synonyms I would search for synonyms, if I wanted to emphasize something then I may want to use this website. Except it's just another synonyms website.
