Well, this is data is drawn from higher RP players, so apparently cards like Alrune fall out of favor as RP goes up, even though she's very popular in general. Probably the single most interesting data that can be gotten from this list is what cards that see a lot of use in general still made the list.
Since top cards tend to get used more, which means their use is perfected and anyone watching matches can see how to use them well, high use cards tend to get used more and more over time. This means that after the top cards, things drop off fairly quickly (at least after a set's been out for a while) so I think this is fairly useful at 75%.
"Scissors are overpowered. Rock is fine." -Paper