This does not make sense to me.
The site says this:
Participants will be assigned to one of two groups: Half of all the participants will be on the investigational once weekly insulin
And the title page and link says:
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Title:
Weekly Basal Insulin – Allowing More Flexibility With Treating Type 1 Diabetes.
Link:
h.ttps://rainier-research.com/studies/weekly-basal-insulin-allowing-more-flexibility-with-treating-type-1-diabetes/
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That makes no sense. A once-per-week basal is the OPPOSITE of flexibility!
You are preventing any possibility of flexibility.
Want to have your period? Oh sorry, you gotta wait for the week to be over. Want to eat more? Or exercise more? Sorry, wait until next Monday.
EDIT:
I guess the “flexibility” they are speaking of is that they are adding a different option to try. 
I just didn’t read it that way at first! I see a flat basal that you are stuck with for the whole week and just intuitively think of that as inflexible.
Sorry about that!