Yeh 100% rigged, I'm exactly the same, got almost 12 of each except for R which is on 0.

Done this even multiple times since my server came out like 165 days ago or so and it's the same everytime, ALWAYS 10+ of each and 0 of 1 letter, same goes for most of my group members too.

I mean they just can't do anything nice, off chance 1 of the 5+ events benefits F2P and it's rigged so you get basically nothing.