Pretty much my experience the one time I was awarded an SSSS. In that case, I ticked off last minute change of flight, checking in late due to prior rental car drop off debacle, checking in to sit at the rear with my buddy who checked in on a separate itinerary to sit in J.
No doubt this combination had the SSSS risk engine in overdrive

. Luckily it only happened to me once. Mrs Pineapple, on the same itinerary as me, exhibited the same untrustworthy behaviour, but missed out on SSSS. Go figure.
How is this worked out? No doubt it's a SSSSecret. I think of it as a special SSSStatus awarded by the TSA, their version of WP. WP1 would be the watch list, which I do not aspire to.
Cheers skip