refrigertators that go into storage
You are doing a great job!
With the system clean and open no bad bugs can grow.
Second, with the system turned off, if there is a leak, there will be much less pressure on the lines.
Last some might say that on a motor not regularly run, there will be no oil, so when it starts there will be massive metal on metal contact. Well not with hermetic compressors, like those in fridges.  In those, all the oil settles back in the compressor!
Standing a fridge up for 24 hours is required by some manufacturers to make sure the oil has time to make it back to the compressor.
You are doing everything right for a long life of your new fridge.