We could create an organisation that tests and certifies cars in terms of how well a Brompton fit's into the boot. We give red (doesn't fit) /yellow (does fit, but not upright or not very well)/green (does fit upright and safely w/o hassle) ratings and an additional "excellent" star if more than one fits. Obviously we charge big for the certification but in exchange car manufacturers receive a nicely shaped logo and can advertise that they are certified for Brompton use which will boost their sales to the sky. Which will then lead to all car manufacturers having a Brompton in mind when designing new cars and - even more important - more certifications and thus more money for us.
With the money we earn we can buy T-lines for everyone and later on an island of our own that we rename to Brompton island. It will be shaped in the form of a folded Bromton and have a test track around it. Who is in?
The island could have several promontories each in the shape of the various handlebar options " I'm just taking my T line around the P line..."