Hi @MaximeMB,
The best way to give free access to your users is granting the entitlement through our dashboard or API. For that, you need the user app id and for what I’ve read you don’t seem to have a way to know them since they are all anonymous.
Is there a way you can identify a user in your app? For example, you could enable a hidden feature that you can tell your influencers (like shaking the phone at a specific screen) and that could get the user id from the SDK and perform the API request.
The other way I can think of, is doing it through the stores promo offers. You can generate free codes that you can share to your users and they can get a free subscription. It works like a normal promotional code, they just fill it in the stores and RevenueCat can track it and apply the free subscription. You can read more about the different options here.
Let me know if this helps!