I feel that the key is "they require customers to register with personal information without providing account-based features". Instapaper, for example, require

I feel that the key is "they require customers to register with personal information without providing account-based features". Instapaper, for example, requires a login, but not requires personal informations, only a login (that could be anything). I could be wrong, of course. I use Instapaper and not this app.