We do not control the market evolution and thus we cannot control the mining rewards. There are certain factors which may affect your outputs depending on the product you have purchased.
This is the way your mining outputs will mostly vary:
It may happen that due to the lower mining output, the global interest in mining the natively mined coin of your contract diminishes. This would mean a decrease in the mining difficulty, which would also have a positive impact increasing your mining outputs. Conversely, if difficulty rises, your output will decrease.
Also keep in mind that some of our products have maintenance fees attached. You will find the maintenance fee details of your chosen contract in the Terms of Service before the purchase, or via our FAQs page.