I still believe that the referral program is actually the best form of attracting people to a website and especially to a cryptocurrency operating website so I don't see any other strategy that a website can deploy to attract more members to it other than the referral program.The referral system is very prominent in the cryptocurrency community however I think what are the earning potential and opportunities it is not exactly prominent. After all there are some platforms that are actually able to achieve a good amount of people without having to rely on the referral system.