BBWCupid review
BBWCupid is a dating service that lets people create a profile and review matches for free. Its terms put additional features behind a paid subscription.
Check which messages depend on the plan
The terms say that when a subscription ends, access to premium features is suspended. That can include messages you already received. BBWCupid’s cancellation policy directs members to Settings, then Billing, to stop future charges. Adult Match Maker describes one message credit for starting a conversation, with later replies in that thread covered.

What a profile and the report button tell you
The terms say BBWCupid may request identification and describe how information from a profile can be used for matching. The community rules prohibit unsolicited sexual messages and tell members to report abuse from a profile or message, or through the contact form.
Anabel’s take
I’d browse the free match list before deciding if I needed the paid inbox. I’d check which threads I could still open after the subscription ended.