Well, but everyone can run as much nodes as he has VPS, right (as no any personal data needed for prove your identity)? So how do they prove this? And what sense in this at all?
No, because touring test is run periodically (every 16 days currently) for all nodes at the same time. So you can't solve test for many nodes at the same time, because you have only 2 min when short session starts and 6 flips to solve.
Read more about IDENA from links that I provided and you will know what sense it makes.
Just note that IDENA is currently under "human farm attack" that owns 15% of network. This thing was detected and team works on solving this. Just wanted you to know. You can read a lot more in bitcointalk thread that I also provided. There is discussion about that too.
Ok, thank you. Will look into it. But whats is the usecase of this coin? mining for mining is not a reason to buy and hold coins like Bitcoin nowdays. Beside this we should have usecase of current coins nowdays.