In looking around my area for shared solutions I find very few.
https://www.ngs.noaa.gov/OPUS/view.jsp
The DOT submitted 6 in this county (some not easily accessed without trespassing or traffic control), and I find several counties I routinely pass through or visit have none shared.
One use of these solutions is the GPS on Benchmarks program, where measured data can be used to check their next model and is thus more useful than a simple recovery report.
http://www.ngs.noaa.gov/GPSonBM/
In your work, do you find a use for shared solutions submitted by others? Do you submit them?
I would use someone else's solution as a check that might in some cases eliminate the need for a second occupation of the control point, but otherwise, I wouldn't in an area where it is just too easy to run your own receiver and get an OPUS solution from known methods and procedures.
As an example, I located a monument on the line between the Texas counties of Travis and Hays by GPS ties from an OPUS-derived position a mile and a half away and later noted that a solution appeared in the OPUS database that checked within about 0.015 ft. horizontally. The monument was removed by highway widening, but the independent OPUS solution by unknown others demonstrated that the coordinates of the monument were very well determined.
I always have good intentions to share, but I usually get tripped up by not taking the requisite photos, and I end up bailing out of the sharing page.