The mining rate (number of coins earned per hour) is mainly determined by the number of miners you run concurrently. In case of Hadron, mining means performing a useful calculation (matrix multiplication and likes) for image classification and other AI tasks.
You can get the best gain by increasing your echelon level. The mining rate of a device with graphic card is not many times more than that of device without graphic card, as we see in mining for other cryptocurrencies.