TV infomercial, but the introduction of online shopping has juiced the practice up to unprecedented heights. On top of that, the fact that you can power pretty much anything via USB these days has opened up a whole new world of weird-yet-useful-but-still-weird products you can use just by plugging into your computer (or phone charger). Here are some of the best/weirdest. https://www.thrillist.com/tech/nation/usb-gadgets-devices-to-buy-online/tech