100% agree. User research can be so taxing, and so many times it's led us in the wrong direction. While it can be guide you in the right direction, product teams need more data driven DNA.
Totally agree. This will depend by business. We're were just pointing out that it makes sense to challenge the norm, because people are so reluctant to give their email addresses.
Agree. It will depend on site, but we often don't challenge if email collection is worthwhile. One idea we had is to ask for an email afterward as an optional password discovery option if the user wants it. That way they are in control.
100% agree. This worked for us, but is likely to vary by business and this is not a silver bullet. I do think though people who register with email and convert tend to be people who would convert already (i.e., there is a bias already). Product managers can test opening up the funnel more by asking for emails later in the funnel.
We use some tools to understand traffic and fortunately most of the traffic is clean. One downside with asking for usernames alone is that people (not too surprisingly), come up with creative but very profane usernames!
We're hoping to test an email password recovery option after the account is set up. It builds on the idea of getting more information after commitment.