Today’s best deals: Real diamond earrings for $60, viral $24 gadget from TikTok, $15 Amazon credit, $5 smart plugs, more

Friday's roundup of the best daily deals online is packed full of goodies, but there's one bargain that rises above the rest: Free money from Amazon!

Buy a $50 Amazon gift card and Amazon will give you a $15 credit for free when you enter the coupon code GIFTCARD2021 at checkout. The catch is that you can only get the free $15 bonus if you've never bought Amazon gift cards before on the Amazon website (in-store purchases are fine). It's easy to figure out whether or not you're eligible. If the coupon works for you, you'll see the following message near the top of the page after you enter the promo code: "Congratulations, your purchase qualifies you for an Amazon.com credit. A one-time $15 promotional credit will be automatically applied to your account and emailed to you within three (3) days after shipping." Why on Earth would anyone pass up free money?!

Other highlights from today's roundup include real diamond stud earrings for just $59.90 that Amazon shoppers absolutely love, Apple's best-selling AirPods Pro earphones for just $197 instead of $249, the crazy wireless camera that lets your smartphone see inside anything for only $32.99, Tuff & Co iPhone cases that our readers can't stop raving about with a 32% discount, insanely popular Gosund Wi-Fi smart plugs for only $4.72 each when you clip the coupon and use the promo code EXSH75VZ at checkout (deal expires today!), the Bondic plastic welding kit that when ultra-viral on TikTok for only $23.95, best-selling Tozo T6 true wireless earbuds for $23.99 that have over 100,000 5-star ratings, TP-Link white LED smart bulbs and TP-Link color LED smart bulbs both at all-time low prices, the wildly popular Roomba 675 robot vacuum for just $199 instead of $280, a huge 33% discount on Amazon's #1 best-selling mattress topper, a big one-day sale on Garmin smartwatches, 20% off a top-rated portable car jump starter, a big blowout on Amazon Basics AA and AAA batteries, 48 feet of stunning outdoor Edison string lights for $33.99, and more.