There are so many fraud in different spheres. A lot of fraud can be connected with referral system if it will not be good organize.
ELVN is a working messenger. Everybody can download it and start to work with it. ELVN is in App Store and Google Play.
Besides there are a lot of feedback of the users who download messenger in App Store and Google Play. People can read feedbacks to understand how messenger works.
It is very interesting to read the feedback of users who download messenger. It will give more information about the messenger from the people who used the messenger.