I personally used up my xbox rewards and was able to open 10 Sterling Treasure packages. In addition to my free packages I've opened about 20 and have only received one Desolate item.
How about everyone else?
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I don't care, I got the sparrow, and both ships from weekly packages and never spent a dime! (Space age mariner from first ever package, waning star from 7th and sparrow from 9th.)