Check into a cheap hotel during non-tourist season, sometime in the mountains or near a lake or sea. Switch off the phone. Eat + meditate + sleep * 10 days (or however many you want). Et voila. You get all the benefits without all the cultiness.
Vipassana is a technique. You master the technique by doing it. Attending a cult's course is one way of doing it.
Whether it is the optimal method is open to debate. The key seems to be to spend long hours practicing the technique for many days (vs 30 minutes a day). I'm not convinced proficiency in the technique can only by attained by a retreat with a specific organization.
One can learn to program in Clojure (say) by attending a 10 day course by $ClojureGuru. One can also learn to program with a book and a laptop, and occasional questions on irc. Both methods work, and have different trade offs.
Personally, I learned Vipassana (and Jhana) meditation by myself, by reading and experimenting. I've since encountered advanced Buddhist mediators (abbots of Buddhist monasteries etc) who 'confirmed' I'm "doing it right" (fwiw, I wasn't really looking for validation or advice, it just came up in conversation). They didn't seem surprised I taught myself. So I doubt it is that uncommon. If the only way to learn to 'hack' is to attend a 10 day course, that isn't much of a 'hack' in the first place.
I strongly push back against the "only way to learn is be attending a 10 day course" idea. Other than this, I enjoyed reading the paper, Steven is an excellent writer.
My 2 cents. YMMV, as it should.
PS: I do admire the grit of anyone who actually completes the 10 day retreat, not so much the meditation as enduring all the culty BS. As grit training, it probably works ;-)
PPS: I have no belief in the religious dogma of any Buddhist school. I just think the techniques are useful