What is a service you would gladly pay $25/mo for?

A flat fee on-demand self-driving/rental electrical car service with total driving distance of 500km/mo.

A service that I value at greater than $25. Kind of a silly question without more specifics.

broadband internet, can do so much with it for $25, easily worth the $25.

Tech Support Troll, who sends petulant emails to unsuspecting support addresses of one's choosing. Fun for the whole work family.