Here's the second highest comment on the Reddit thread Rap posted, highlighting a portion of the EULA that OP doesn't specify:
[may not] sell entitlements that affect gameplay provided that they do not adversely or negatively another player’s experience and provided they do not give a competitive gameplay advantage. A competitive gameplay advantage is something that, given identical skill levels, time investment, and circumstances, can cause one player or group to perform better than another.
- Be aware that certain games or game modes can be designed as non-competitive (such as a player-versus-environment (PvE) game) and become competitive by adding gameplay elements such as a leaderboard.
Given identical skill levels, time investment, and circumstances, a non-paying player would receive
75% of the mana awarded an MVP-ranked player, and
50% of the mana an MVP+ or Elite will receive. Not to mention those players getting to use /speed 5, which often allows for ways to skip tough jumps, the ability to breeze through sequences of jumps without needing to touch the spacebar, etc. etc.
If there were no prestige leaderboard (or maps completed, monthly mana, or any other
besides score), there would be no problem.
Seth, it's kind of you to sell your cubits to players who want to buy ranks and grow Dacon's economy. I know it's also nice to see oneself at the top of any leaderboard, not to mention one with such elite names as Cherilyns, spnu, and Ozzyblack21. However, I'm sure you're also aware that your prestiges are much less legitimate than the other players that you have come to pass.
- Yes, I'm aware Cherilyns is privy to 200% mana gain, but so is everyone else on the board almost by default and she has gained her prestiges in the true spirit of Manacube; grinding her ass off.