Interesting, so the OP doesn't have Ehtereum listed but the website does. So, the Ethereum project/devs is on-board with Blocknet?
Yes, Ethereum devs are on-board with Blocknet as shown on one of their own websites. See quote below:
How listing in a catalog containing more than 100 other Ethereum apps proves that Ethereum devs are on-board with Blocknet?
Edit: Looks like it's language nuances. "Ethereum devs" = "devs who use Ethereum", not "devs who created Ethereum".