So $1 of usage for $0.13?

That sounds entirely plausible. When I was on the Claude Max $100 plan, I would often get the equivalent of at least $1300 API usage, according to the costs counter in Claude Code. That would be about $1 of usage for every $0.075c.

At $1 of usage for $0.13, the reseller is making a tidy profit on top of whatever subscriptions they're reselling.