I don't really understand these kinds of initiatives that say they will use "blockchain technology", but seem to imply that they won't use the bitcoin blockchain.

It's the amount of computing power that keeps a blockchain secure and an independent blockchain has no hope of reaching the same level of hashing as the bitcoin blockchain.

It's the question of how their technology will interact with the bitcoin blockchain to leverage that hashing power that I'm interested in.

Or perhaps they could just be happy with a blockchain that might be (relatively) easy to attack.