For users who can afford it, routing a vpn through tor solves the captcha issue with cloudflare. Also adds an extra layer of security
I cannot imagine how Cloudflare could distinguish VPN traffic routed through Tor and standard traffic routed through Tor. The only difference is a hop on the front end, no change to what comes out the exit node.
Edit: This is good if you are trying to maintain an Internet profile (i.e. Facebook, twitter etc.) that isn't tied to your true identity.
If that's not your aim (like you say - being signed in to the same facebook account all day suffers you the same problem) then this isn't an issue.
But this isn't what a lot of tor users want tor for.