Hello, Flavio ,
All units already created on free accounts will remain working in the application.
On newly created accounts, the limits, as we wrote, will be reduced. Now, with the Free plan, you will not be able to create 3 free units.
3 units can now be created with a Premium subscription, which costs about two dollars a month. Also Premium subscription will give you 100 MB for each unit. And all this for the price of 1 cup of coffee.