Complete nonsense. Today the trend is to simplify the registration form as much as possible so as not to scare away the client, and you release a plugin that asks the user to waste time, and this is bad for user experience. If you don't understand, study the topic using examples of online stores. So the mom plugin is nonsense that will scare away clients. Yes, I do not argue that it will suit a promoted resource with a traffic of 100,000 people per day, but there are not many of them.