While it is true that a large number of courses have proliferated to train people and business employees in blockchain, oriented to cryptocurrencies and all its environment that derive from them including financial applications and all processes. Also of vital importance are the education to developers who at the end of the day are the actors that enable the activity and give life to the blockchain, in that sense it is vital the existence and the great contribution that these companies like Hyperledger bring to the blockchain.
Usually the courses for developers are expensive but this academy offers a package of introductory courses totally free, something that I had seen little so far,
The courses are of reduced content as they focus on the development needs in the hyperlegger environment, which are open source development tools for specific applications and communication environment, there are also interesting topics such as the one that describes smart contracts at the development level, all for specific purposes and for the benefit of the hyperlegger environment.
I am not aware of prices for the advanced certificates.