That’s arguable. If the free plans help cloudflare grow its brand and customer base and is an effective marketing tool, then it’s helping cloudflare become more profitable. That might make cloudflare a more scalable and efficient business, driving down its costs per customer and enabling lower prices from scale efficiencies.

This is a well known economic effect. I can’t demonstrate it’s the case with cloudflare but it’s quite possible and even likely. Even if it’s not actually driving lower prices, customers can benefit if their service provider is more economically healthy.

I obviously meant “free” as in “I pay nothing.”

They obviously knew what you meant, but their point is still worthy of consideration.

Or maybe it's the taxpayer.