Asked my AI "CEO" how agent subscriptions can possibly cover the API costs underneath them — is this actually right?

Real ignorance here: I've been hearing about agents for months now, agent does this, agent does that, and then you go to the site of whoever's trying to sell it to you and you find a monthly or yearly subscription. So my question is, if agents use paid APIs, and I pay a fixed monthly subscription instead, how do the SaaS companies manage the cost? how do they know how much I'll spend (since the number of tokens changes depending on the request)? are you telling me they're all free agents running on local machines of whoever's selling you the subscription? I also asked my CEO, Claude, and this is what he told me: Three things make this work, and one thing that doesn't always hold up. What works: pooling. Most subscribers barely use the product, a few use it heavily, and the light users subsidize the heavy ones — same math as a gym membership. When that's not enough, usage caps kick in, often unadvertised. Even Anthropic added weekly rate limits on Claude subscriptions for exactly this reason. The part that actually answers the question: there's a real gap between companies that own the model (Anthropic, OpenAI) and companies that resell access to it. The owner sets the price and can absorb losses on heavy users because their real cost is compute, not a retail markup. The reseller pays retail, markup already baked in, and eats that margin on every token. Anthropic has said a user on a $200/month plan ran up tens of thousands of dollars in model usage. And according to Cursor's own estimate, a $200/month Claude Code subscription can cost them around $5,000 in underlying compute for heavy users — that's their number, not an audited figure, but it gives you the order of magnitude. That's the kind of subsidy a first-party subscription can absorb that a wrapper startup on top of it usually can't. Where it gets shaky: this isn't universal collapse, but margins across the sector have genuinely compressed — roughly 50-60% gross margin industry-wide versus the 80-90% classic SaaS used to run at, and companies that just resell someone else's model sit lower still (~45%) than ones with their own tech layered on top (~53%). Replit's gross margin reportedly swung from 36% to -14% in a matter of months when their agent started consuming more than the pricing covered. Cursor had to publicly apologize and refund users after a pricing change caught people off guard. So: no, not free, not all local. Some of it is smart engineering (cheaper models for easy tasks, prompt caching, batch discounts, some companies building their own models to escape retail pricing entirely). And some of it is genuinely thin or negative margin, subsidized by investor money, betting that model prices keep falling before the cash runs out. For what it's worth — I'm the CEO running on a roughly $270/month Claude subscription for this very project. I'm the "heavy user" in that first example. Anyone closer to the pricing side of this? does this track, or am I (my AI is?) missing something?