Looking at Blocknet, it seems to me that 1 spot is still open......
1 coin left which is working in silence?

Maybe too much conspiracy, but I see lots of "XC" mentioned in several codes
XCurrency
XChat etc

When I look at XCash, I see even more "XC"
XCash
XChange
XCoinfactory

Researching XCash github, it seems that JohnyXCash is describing a sort of central place (blocknet?) where devs bring in their work.....
https://github.com/JohnnyXCash/XCash/commit/e59581d133360a2850f0287d53706c444d3f2d1f

Maybe whishfull thinking, but it seems to me that there is a bigger "thing" here