I have spoken to several people charging at Qualcomm. I believe that there would be no lines if local people and the commercial livery drivers did not take advantage of the free charging there. Met a guy that lived less than a mile away who swooped into an open spot, by-passing the line and told me that he charges here for free, but need to pay if he uses his charging station in his garage. Said he usually just catches up on his email while he waits for his charge.
I sometimes see several livery black Tesla with commercial white lettering on their cars and uniformed drivers. They charge up there many times a day.
You either got lucky and talked to a regular user or that user is lying to you. It use to be most people go there to get a free charge when the there were minimal Model 3s. Now it is mostly Qualcomm employee. I am pretty sure of this because of the following I have observed:
1) I see Model 3/S/X where the people have Qualcomm picture IDs once they leave after plugging in. And I see those IDs when they come back to move their Teslas.
2) I see Tesla moving to another parking spot nearby once they are done charging.
3) The sheer number of Model 3s meaning employees before who wanted Tesla but could not afford the Model S/X could now get a cheaper cost Model 3 and charge there.
4) Usually around 5PM during normal week days and 6PM on Fridays, I notice more stalls opening up. Normally there will alway be a line other than before 6AM and after 11PM. This coincide exactly with when Qualcomm employees leave for the day.
5) The wait time is probably gotten to a point where those regular people, who would like to get a free charge, are now changing their behavior and charging a lot earlier or a lot later.
Again I have nothing against Qualcomm employee charging there because Qualcomm is technically offering this as a perk for their employee, but I just feel Tesla should open more stalls for their regular owners.
Right now, Qualcomm has little to no incentive or even a disincentive to open new stalls. Tesla is trying be profitable this quarter and going forward so I seriously doubt they would open more stalls at Qualcomm campus to address this congestion/charging issues.