One interesting invite system is the invite-only beta testing used by software companies, while another is the referral system used to grow user bases and reward loyalty.
Last month, it was very interesting to participate in an AMA macaque request. It was in the form of adding a virtual game, where each person entered with a color correction, and all participants were randomly divided into 4 colors. Then, they followed the AMA in the game and did various designated actions, and according to the overall completion status, lucky ones were generated.
Increase the threshold for inviting and being invited, such as having applicants write about their reasons for joining, and then make a selection based on the content
A card that reminds me what I travel in the web3 and the card contians a QR code .
I haven't come across many but I saw one at the train station, a job-ad stated a coding problem which would give you the last words of an invite link to apply. 🙂
Clubhouse when it was invite only and early members had limited invites (like what Orb did at the beginning!)