Thanks for the positive feedback everyone, I did it out of my own curiosity but glad others found it useful.
For the gear table on where to buy Tiggus already has that covered and my findings were aligned with his chart.
As far as dynamic rates, obviously they collect and analyze data but whether they use that for design decisions or used to dynamically alter drop rates for revenue purposes will never be proven without a lot more data. Not just speculation.
Regardless of if and how rates are altered, there isn't much players can do. If I had to speculate, and purely speculate, I would guess rates might be lowered for those with large crystal balances from a baseline of a F2P. You can't get blood from a stone but cash burns a hole in your wallet.