Meta is heavily promoting its new AI assistant, Muse. Credit: Cheng Xin/Getty ImagesEvery time a new AI assistant tool launches, seemingly every week, it announces it’s handling checkout and payments through Stripe’s tool, Link.Instinct, Muse and Grok Bot agents all make purchases on their human users’ behalves through Link; so do work-focused agents like Skydive and Town, as well as a long tail of newer or more niche apps, like Underdog, announced earlier this week. (Anthropic and OpenAI use Li...