I'm working on a flow for starting a free trial for a paid product. We're exploring using a phone number (SMS them a code, they enter the code on our site) to validate the user as unique. What are your thoughts on this approach? Are you familiar with products or services that use this? Any that use it with particular success? How would that compare with something like using Facebook authentication?
Doing some work on signing up for product alerts, but having trouble finding any best practice documents around it. Does anyone have any resources on this?
At the moment this hasn't been scoped out at all, so methods of communication haven't been defined yet but I would expect this to include, email, and possibly Twitter and SMS if specified. Aside from basic personalisation rules for setting what you're contacted about, frequency etc, what are some best practice rules?