First it was Ubers. Then it was Wendy’s hamburgers (except the fast food chain clarified it was technically dynamic pricing, not surge pricing). But now, the real deal — surge pricing — is targeting your checked bags.

JetBlue quietly (sneakily?) introduced “peak” and “off-peak” pricing to its checked bag fees on March 22, a fact the world was alerted to because my editor happened to check the JetBlue website. That means you have to pay $5 to $10 more each way for checked bags on JetBlue when flying during busy travel times, such as the summer, much of the winter and some random weeks in the spring.