Since I was able to guess/diagnose and fix this problem myself, I am pretty sure it was "operator error," but I want to give everyone a heads-up in case you screw up the same way I did. I had a nice ride this morning -- my FIRST Uber Beacon WORKED ride! (I'm still tingling!) After that ride, I got a Lyft ping and a nice ride. Then nothing. Then another Lyft, and another, then nothing. Then another Lyft. About that point, my peanut brain wondered why no Uber pings? -- which, for me here in Miami, outnumber Lyft 4-5 to 1. Hmmm.