Meh, I like the word. It means a typical person doesn't have to worry about going over the limit. For hacker-types, it often means "how can I use this up for myself..."
Just calling it the "15 TB plan" also means a typical person doesn't have to worry about going over the limit but lets the non-typical user know you don't consider 30 TB fair use before they bother signing up for your service and uploading all their data.