alt Hacker NewsTwitter won't have your various device IDs and VPN IPs are typically shared among many clients simultaneously. You could certainly generate a suspect list but I don't think you'll get conclusive evidence.
That said I don't know how much browser fingerprinting Twitter might be doing and if fingerprints from other services might be possible to crossreference. Much higher risk is probably visiting other sites both with and without the VPN using the same browser without thinking about it and thus leaking your fingerprint or even account cookies that way. Or if you don't run a filter then visiting a site without the VPN that embeds Twitter tracking assets would leak to them directly.
You're right that you can end up with a suspect list instead of a direct answer, but it shouldn't be hard to narrow it down from there, especially in a case like this where most people wouldn't have access to privileged info about unaired shows to start with. It also helps if you have more than one IP address to start with. You can end up with multiple suspect lists, but only one or two people who show up on all of them.