Sounds like not enough people were subscribing so she set it so messages went to expired subs in hopes they'd buy the DM content.
Descriptions sound more explicit lately but I assume it's still just lewd only?
almost certainly still only mildly lewd, she or whoever is managing the account is a scam artist, they'll make it sound like she's finally decided to go full-on slut but they'll be still the same disappointingly mild lewd images.