Draw your own conclusions as you see fit. This is only a snapshot of a constantly changing Forum.
Accuracy is not guaranteed. I have no dog in this fight nor is it intended to be one and maybe I have too much time on my hands.
Numbers only based on forum statistics after Moparts reset in 2003 thru 12/31/23.
Any duplicates are not indicated. Some members of top 50 are deceased.

Total registered Moparts members 28,080
Of top 50 contributors:
38 joined 2003
4 joined 2004
2 joined 2005
2 joined 2007
1 joined 2008
1 joined 2009
1 joined 2012
The top 50 combined contributed 1,425,198 times
1-10 contributed 655,536 times
11-40 contributed 588,210 times
41-50 contributed 188,452 times
1379 members contributed 2 times
2391 members contributed 1 time
10,060 members have never contributed
The top 4 contributors have a spread of approx 35,000 contributions
The top 50 have a spread of approx 85,000 contributions

Happy New Year boogie

Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.