And yes, I did think "this is terrible, there must be a way to change it", clicking the snowflake icon. The colour changed to a new colour but otherwise it didn't seem to change, so I just clicked back.
Because, as you noted, the snowflakes slowly end, which I didn't realize until seeing your comment.
It's fun. Looks neat. It's an extremely poor idea for a site trying to convey textual information.