(Image credit: Eufy/Wyze/Blink) Every Prime Day, Black Friday, or other holiday, you’ll often see some of the biggest discounts on security cameras from the likes of Ring, Google, Blink, Arlo, and other well-known companies. You’ll often be able to pick up one of the best home security cameras or video doorbells for half off their original price, or get a great deal on a bundle. But that’s how they get you. You see, these companies can afford to practically give away their devices because they know they’ll be able to hook you into a long-term subscription — because without it, their cameras are practically useless. When Savannah Guthrie’s mother was abducted , the FBI was only able to get footage from her Nest Doorbell by combing through Google’s servers. That’s because she no longer had a subscription that automatically saved her footage. Once upon a time, companies offered some amount of cloud storage for free.…