My situation is, likely, a bit different. On the familial side I required it to participate in sharing of data. Those who didn't want to use it (none) couldn't participate. Nobody really minded and when I explained why - everyone thought it made sense. I also happen to be surrounded by family who trusts each other in their respective fields and I happen to be the only one in a technical position. So, by default, my opinion has weight (good, bad or otherwise). Easy sell there and it costs all participants $0. There's about a dozen users in this group that are active.
Friends and colleagues are a different tact. I work in a space where Signal makes sense for what I do, people already get it. There are people I work with that I've incented to start using it based on Signal groups they couldn't participate in otherwise. That worked well, but bootstrapping that is the hurdle. Some didn't know what Signal was and didn't question it at all when I suggested it (probably not the best approach). Looking at my Signal "Insights" for the week and I'm at 97% encrypted messaging. The 3% is service messages being delivered via SMS and one person I've texted that I've only recently started interacting with. I've used the "I need to send you this securely" a few times, which has also worked well. In those cases, since the barrier to entry is just installing, it's rarely been met with resistance.
I'm not sure these help. I'd like to think I've trickled Signal out to hundreds of people over the years. Keep in mind when I started with this it was RedPhone/TextSecure, so it's been years. Consistency is a helpful driver.
Friends and colleagues are a different tact. I work in a space where Signal makes sense for what I do, people already get it. There are people I work with that I've incented to start using it based on Signal groups they couldn't participate in otherwise. That worked well, but bootstrapping that is the hurdle. Some didn't know what Signal was and didn't question it at all when I suggested it (probably not the best approach). Looking at my Signal "Insights" for the week and I'm at 97% encrypted messaging. The 3% is service messages being delivered via SMS and one person I've texted that I've only recently started interacting with. I've used the "I need to send you this securely" a few times, which has also worked well. In those cases, since the barrier to entry is just installing, it's rarely been met with resistance.
I'm not sure these help. I'd like to think I've trickled Signal out to hundreds of people over the years. Keep in mind when I started with this it was RedPhone/TextSecure, so it's been years. Consistency is a helpful driver.