[tor-relays] Huge increase in bridge connections

Just trying to understand if this is normal or if something else is going on. I have 2 bridges on a VPS.  One is designated as "moat", the other "email".  Until earlier today, for over a year, both averaged under 10 unique clients, per 6-hour reporting period. Today, the "moat" bridge, in a single period went from single digits to almost 300 unique clients.  Is this normal/possible or what other explanation could there be.