From my experience, features are added to the Enterprise offerings, and then eventually brought down to lower plan levels. However, most things are based on usage now, not plan level and I expect that is a better path to monetization for CF compared to simply raising prices.
For a couple of my larger sites (PDF and Image heavy), I am unable to justify the Argo cost. On these sites, over half of my monthly traffic is to bots (Googlebot, Bingbot, Yandex, etc). Traffic costs make up of around half of my hosting bill. A couple of things are keeping me from transitioning these sites to Argo: - I'd rather pay to speed up only real-users (not bots) - I'd rather not pay for traffic not routed over Argo (currently all traffic gets billed under Argo for enabled domains, not just the smart-routed traffic)
I currently pay the following rates from Google Cloud->CloudFlare (depending on the CF datacenter the data gets routed to). NA: $0.04/GB EU: $0.05/GB APAC: $0.06/GB
If I could pay a similar rate for a speedup (for only the Argo-routed traffic), I'd be more likely to sign up for Argo on all of my domains.