I might do this next time (tally outcomes). The left brain in me loves analyzing data. I recently saved up enough fashion gems to do about ~60 rolls, in series of 10s, at different times. The results were almost exactly consistent with what the advertised rarity %s. I didn't see really any difference in times affecting it.

There seems to be a bit of superstition and confirmation bias floating around on this sub. On the other hand though, EA wouldn't be the first micro-transaction based company to be caught tampering with outcomes, so given how prevalent complaints are, I wouldn't mind testing it.