This was my 2nd GS.
Last year I had 36 hits.
This year me and mom both hit 36 and a friend hit 20 (18 of which happened in the last 36 hours)

I would like to point out the use of Hyatt stays as last minute hits.
Because they can be credited after the fact you can avoid wasting a safety hit.
They first get credited to miles and then you can call and have them switched to miles. Even when I try to credit to miles they seem to post as points but it works to your advantage during the GS.
If all my hits come through I can use them for whatever other mileage promo is being offered.

I hope US continues this but I have my doubts. Every year people will jump on the bandwagon and eventually US will either eliminate or cut it. I see something similar to the Continental version where you have to book all hotels and cars through continental.com.