In the network Callisto implemented a treasury model. A certain part of the reward from each block is allocated to the Callisto team to finance the further development of the project.
We will only be interested in the first - although Callisto's profitability can now be compared with the profitability of the air, for home-based trading on the exchanges equally unsuitable, and then, and more. Profitability of mining is meaningful to analyze only when we try to forecast trends in the market, but more on this later.
As for the prospects, the cold-steak gives an excellent alternative to proof-of-stake competitors: there is no need to run "masternodes", it is enough just to transfer the coins to the corresponding address of the contract.
Especially strong demand should grow with market depression and an increase in the entrance threshold in the ICO - here the project will compete with Tether and other "stibblkones" as a means against devaluation of crypto-currency reserves.