1. Maplebear shares fell 6% amid FTC probe into Instacart's pricing tool. 2. The FTC is investigating AI-based Eversight tool for potential unfair pricing. 3. Reports indicate Instacart charged up to 23% more for identical items. 4. The FTC's actions distressingly highlight concerns about Instacart’s pricing practices. 5. Instacart claims only a few retailers use Eversight for limited tests.