There's something to be said about the service feeling worth it. With a product you can game the feel, like extra weight in a remote. But with a service...
I worked for years as a bike messenger. There's some minor vocational mystery as with the locksmith, but clients generally understood that our job was dangerous and that we did it well. Still...the only time we saw a tip was when we got documents to an office just in the nick of time — too early lacked the drama. There's a perception of extra effort, which anyone appreciates when you're paying a professional to do something that's impossible for you but easy for them.
I worked for years as a bike messenger. There's some minor vocational mystery as with the locksmith, but clients generally understood that our job was dangerous and that we did it well. Still...the only time we saw a tip was when we got documents to an office just in the nick of time — too early lacked the drama. There's a perception of extra effort, which anyone appreciates when you're paying a professional to do something that's impossible for you but easy for them.