For the fact we can think it we can achieve. What we can't think we can't achieve. Games are ways of creating interaction. Achieving 50 000 000 users who can be active daily is possible only rewards are attached to those who brings new users.
I therefore support activity tokens. If each activity we do on steemit comes with a reward then hitting fifty million users is a huge possibility. Thanks sir @dobartim.
I am positive that #steemschools is able to pilot this idea.