How does this, (or 12ft.io for that matter) actually work? Client-side trickery? Magic cookies? Something like adblock?
EDIT: Apparently it just blocks JS and disguises itself as an SE crawler. This still doesn't work on sites like Bloomberg, and if I understand correctly nothing can be done there.
I use the Bypass Paywalls Clean extension in Firefox to access Bloomberg, among others. I had it installed before it got taken down, so be careful where you get it from nowadays.