Witness Account performance

I setup 2 accounts for 18 month time period.

1. 10k
2. 50k.

After first 3 months the 10k witness account only made 40, the 50k witness account made 440 coins. 50k/10k * 40 = 200nlg if I created 5 10k accounts over same time.

It is better to have 1 account with larger amount then 5 accounts adding up to the same amount. This is a well designed system, going to try 100k for 18 months and will report back on performance.