The strength of most community platforms is they are asynchronous.
If someone doesn’t login today, they don’t miss out on anything. They can catch up tomorrow.
But that strength is also a weakness. If you don’t need to visit today, then why bother? In fact, why not wait a few weeks?
A growing number of apps tackle this by incorporating the daily bonus.
If you don’t login that day, you miss out.
What would your daily bonus be? What piece of information, exclusive activity, or unique opportunity is only available today?
If you want someone to visit today, give them something that’s only available today.