I looked into it also. Just put the IP address for each node from any coin into Google and other coins will show up it seems.
One matches RIOT coin as well.
I am not a Dev but I would guess that many coins use the same server companies or people that run nodes for coins.
On the other hand it's also possible that there are several "teams" that make coin after coin re-using the same IP out of laziness.
But I think it's more likely that there are just so many of the same people that jump from team to team and mix up everything
like hosting and IPs and graphics that it looks like it's the same team behind each coin. I know from experience that
many people who provide services work on many different coins.
Mind bending....
I don't think it's "proof" of anything and will never be. But it is a piece of information.
If any Devs with reputation can clarify in a convincing way the nodes are re-used and how.
I think it would help Keycoin rep if anything to explain it. I saw a post about it was removed from Key thread. I just
happened to see it the few minutes it was there before moderation. I am not a Dev so it's something
I would like to learn about.
-- I want to add here that Key is really making innovations that are usable and they have a great team it seems.
People make coins and they fail and move to new ones that do not fail. It's not the end of the world
Just best to clarify to the IP node clueless what happens behind the scenes.