I've been around kryptonia for a some time already and I use the platform mainly to promote my steemit posts. I buy SUP on south exchange and use them for my tasks. My 3 favourites features:
Kryptonia bot: Each time I promote a post over Kryptonia, I love to get the upvote from the Kryptonia bot and its trail. This give a huge boost to my posts. So when I use kryptonia to promote my steemit posts, I profit in 3 ways. 1) I get the upvotes from the bots, 2) I get the upvotes from the people who take the tasks, 3) It creates real interaction with the users.
The possibility to revoke: It seems not such an important feature for many but I really like the possibility to revoke users that do not complete the tasks as asked. It allows me to pay higher payments to the people who really do what I ask for.
Based on Superiorcoin: It is great that Kryptonia is based on a crypto currency like Superiorcoin. It can be traded easily, sent to other users or to an exchange and there is a real ecosystem growing around it. I believe that an ecosystem is the basis for a coin to survive in the long term.
Kryptonia ID: @achim03