According to the calculator, the other options would cost from $12000 to $250000. This is roughly cost for 35 - 730 years of all our current services combined (CF cert, 2x VPS, domain). Looking at the detailed pricing, it might be affected by me being in Europe, but still…
Re. some sibling comments – never got any e-mail from CF suggesting to move to their paid plan.
And it’s not cheap. More expensive than Fastly in our case (though we went with Google CDN and saved a bunch of money and got better performance).
1) Person A recommends CloudFlare as a CDN because it's really cheap
2) Person B warns that the were using CF in this manner and had their account closed
3) CF rep comes in to clarify that no such policy exists