Referral campaign is good for growing community in all social media.
The referral program is certainly very good, but I don't like projects where she comes to the fore and all work is to attract new users.
In my opinion, developers should attract new users with their product, not a referral program. Anyway, the funds allocated for it can be spent on other marketing research.
Absolutely any ways to attract users to the platform will be useful for the development of the platform itself.