The difference being this percentage is going to grow substantially faster given the amount of new masternodes able to be put online over x period of time from new coin generation alone. Most smaller owners aren't going to be able to scale their percentages at the same level that this entity can without infusing extra capital.
Pooled MN's will totally fix this.

Potentially, even invert this tendency.
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And eventually, the returns on a masternode will be so much smaller, like even as low as 3%. At some point, it won't be worth it to run one (just like with mining) and someone like this may decide at that point to invest their funds elsewhere.
It's all going to change as DASH matures.
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What do you mean Tante? I didn't quite get that. As is seen it, even in the long run (because 1k is harder and harder and harder to get), having a stake in a pooled MN will be much better than any PoStake coin or even a savings account in FIAT.
And when will the MN % reward decrease? Its only going up!