Users of Claude-hosted apps can't thereby incur financial liability, because it counts against the usage limit of their consumer Claude plan, which either is free or has a fixed monthly subscription price. The worst that can happen is that they run out of quota and can't use Claude anymore until it resets, which happens every day on free plans and every five hours on paid ones. In no case is usage attributed to an API key with metered pricing.
Ah true. So the push becomes even stronger for people to upgrade to the max plans, when several of the "apps" they're using are consuming their allocated Claude tokens. Brilliant.