> each time in some app we were forcing users to confirm their email address upon registration (non-tech founders often insist on this for some reason) we'd see

> each time in some app we were forcing users to confirm their email address upon registration (non-tech founders often insist on this for some reason) we'd see between 40% to even 70% drop. People would register and then never come back because they just didn't care enough to look for our confirmation email. Some countries in Europe require to prove user opt-in consent, in addition the EU General Data Protection Regulation (GDPR)[1] approved in 2016 and active starting from May 2018 will, in practice, extend it to all EU countries. [1] https://en.wikipedia.org/wiki/General_Data_Protection_Regulation https://en.wikipedia.org/wiki/General_Data_Protection_Regula...