So, AFAICT, Hustle provides a service that's nearly as bad as robocalls. From their front page: "Hustle works because people read and respond to texts—and to communication that feels more human." So it's a bait and switch, just like a robocall: you contact me in a way that makes you feel personal, approachable and reasonable to me so that you can gain my attention.
Look, try to see this from my perspective. Without saying anything about the honor and motives of those behind Hustle, it's like I'm being attacked from all sides - Facebook, Robocalls, and now Hustle - to gain my attention. This has always been the case, perhaps, but our modern technology – coupled with a knowledge of human psychology – is a powerful tool (weapon?) for gaining access.
Here's an idea: I don't want to be assaulted all the time via the always-on electronic device I have in my pocket!
I still want to have access whenever I want it. Maybe I can't have it both ways?