Amazon Big Deal Days, Variation Abuse, Walmart’s Collectible Push, and Why AI Is the New SEO

Send us Fan MailIn this September 9, 2025 edition of Selling on Giants – eCommerce News & Updates, Mr. Will unpacks the marketplace shifts that sellers need to know as Q4 ramps up.We start with Amazon’s Prime Big Deal Days, where submissions close September 12 and FBA inventory deadlines are already in play. Deep discounts may unlock merchandising, but only if stock is staged correctly. From there, we tackle catalog “gymnastics”, sellers merging unrelated products into one parent listing to hijack reviews. Amazon’s enforcement remains light, leaving honest brands exposed.Walmart is going after community-driven commerce with “Collector’s Night,” a new livestream series targeting trading cards and memorabilia. Meanwhile, Amazon is sunsetting Prime Invitee on October 1, a reminder that Prime growth is flattening and seller visibility depends on keeping Prime eligibility strong.Beauty continues to grow, forecasted to hit $590 billion by 2030, but proof and value now drive conversion. That ties directly to the rise of AI as the new SEO. If your brand isn’t producing authoritative content, AI models will fill the gaps with competitor or critic voices.We also cover Amazon’s star-only seller feedback update and close with a hack of the week: six video types proven to convert browsers into buyers.FAQs:What are the deadlines for Prime Big Deal Days 2025? Submit deals by September 12. FBA inventory cutoffs: September 10 for minimal splits, September 19 for Amazon-optimized splits.What is catalog variation abuse? Merging functionally different products into one parent listing to hijack reviews and rank.Why is Walmart leaning into livestream shopping? Collectibles drive urgency, repeat purchases, and community — Walmart Live is now positioned as a serious growth channel.What does ending Prime Invitee mean? Amazon is closing loopholes, signaling a push for more paid Prime members. Sellers tied to Prime need to stay optimized.Why is AI called the new SEO? AI models now shape what shoppers see when they ask about your brand. Authoritative, structured content ensures you control the narrative.Subscribe to the Selling on Giants Newsletter for weekly updates: Subscribe on LinkedIn