What's the difference between Rencontre, Social, and Influence on Lymion?

Rencontre is Lymion's dating mode. A subscription unlocks browsing and messaging people looking to date.

Social is the free-to-browse mode, where Guaranteed replies are optional rather than the default way to reach someone.

Influence is built around creators: anyone can set a price to be messaged, and the DM-payment mechanic described elsewhere on this site lives here.

You can be active in more than one mode. They're different ways to use the same account, not separate apps.