Why hold contracts is possible? While you change the duration of contracts from lifetime to OME YEAR ONLY? And Your prices have often changed ($0.60 per 10 GH) reached up to ($2.4 per 10GH) with higher and lower rates of exchange Bitcoin to Dollar?
The change in contract duration was a necessary step - we were forced to change the contract terms due to the market changes outside of our control. There is a global shortage of hardware and the manufacturers have overflowing orders.
Changing prices for products (in this case - for contracts) is normal practice, which is determined by the acquisition of new equipment, demand, market situation etc. and is done by many companies.
Oh, everything is so complicated in cloud mining. Hope we gonna be rewarded for our patience.