Two sellers can offer the same fifty worksheets. One gets refund requests and confused messages, the other gets repeat buyers. The difference is what else is in the folder.
Two big marketplaces, two different rules, and a lot of sellers guessing. Here is what each one actually says in its own words, and the two mistakes people keep making.
Last January a tax form landed in your inbox. This January it probably will not. That does not mean what most sellers think it means, and the misunderstanding is expensive.
Custom GPTs stop running in December, the DALL-E GPT is already gone, and Amazon asks for less disclosure than most sellers give. Six pieces of AI advice that stopped being true in 2026, each one with its date and source.