CylinderKnot you're missing the fact that these values only count on VERSUS mode, not in practice mode. Therefore your calculations are way off.
As HiGuy said, we actually had the original MP values much higher, and we actually tested (back then) on how many games of Multiplayer it would take Jeff, HiGuy and myself after 220 matches, with Jeff having the least (~50 games at most). These gave us an actual look into how many gems each of us got (red/yellow/blue/total gems/total points). These values were then noted to be checked later on during first and second betas in order to be changed if necessary.
(Based on memory, sorry):
A more beginner player like Jeff would have taken ~800-1000 matches to get the red gems achievement, and roughly 2,000 matches to get to the total points achievements.
HiGuy (advanced player) would have taken roughly 350-400 matches to get the red gems achievements, and up to 1,250 matches or so to get the total points achievements.
Myself (a high-end player) actually beat already the red gems achievement (200 matches, so even earlier!), almost got the yellow and was well ahead on blue ones too. The total gems was hitting at 600th match point and the total point at 750 or so matches.
This led to the current values (which threefolder said but I'll repost below):
5,000 reds
2,000 yellows
400 blues
15,000 total gems
30,000 total points
Which looked at HiGuy's level and slightly worse. We knew that people would play for longer than a year so even a casual would have been fine.
Nonetheless the file itself also mentioned easier values (which would have shaved off roughly 150 matches for each player):
3,000 reds
1,500 yellows
200 blues
12,000 total gems
25,000 total points
These were proposed to be looked at during the betas and while somewhat happened, it never got into serious consideration since we were happy with the beta results to have the current values.
And the original ones?
10,000 reds
2,500 yellows
1,000 blues
100,000 total gems
250,000 total points
That would have taken roughly 7,500 matches for me to hit the total points achievement. I'll let you think up how much it would have been for Jeff.
"matan, now i get what you meant a few years back when you said that "the level in mbg is beyond me" after the last rampage i noticed things were insane, and now i truly feel that too" - Dushine, 2015.
Bronze , Silver , Gold , Diamond and Uranium Marble Rewards?
, but other than that I'm good with this idea. It's always nice to have more flairs. 
