I'll bet if you look at the Top 101 most frequent block signers for any major block chain you will find that this same group signs over 90%, maybe even 99%, of the chain's blocks inside a typical transaction confirmation window.   For all such windows.


Everyone who is not a signing insider has a tiny fraction of that final 1% chance to sign a block.  This gratuitous honor is shared among all the outsiders and has no material effect on the reliability, integrity, or security of the network.

So it doesn't matter how many outsiders are eligible to sign a block, they have no relevance whatsoever.  Their chance to win the signing lottery is a mere placebo, designed to make them feel like they are involved.  


No outsider, much less the same outsider, will get honored with another turn in the same confirmation window to weigh in on whether any particular transaction should be confirmed.  Thus, all transactions are confirmed by insiders.


All block chains are completely controlled by their signing insiders.

With Ripple, insiders must appoint new insiders and have economic incentives not to go any where near 101 of them.
With POW systems, you appoint yourself to be an insider by acquiring control of one of the top 101 pools of hardware.
With POS systems, you appoint yourself to be an insider by acquiring control of one of the top 101 pools of coins.
With DPOS systems, you get elected to be an insider by acquiring one of the top 101 most preferred reputations.


So, its your call.  Do you want your blocks signed by people who appointed themselves as insiders through their ability to acquire large pools of coins or hardware?  Or would you rather have that job done by the people, even very poor people, who have done the work necessary to earn one of the best reputations?