Neville Medhora - Kopywriting Kourse.
http://kopywritingkourse.com/

I hung out with Neville in 2013 in Seattle. This guy is a master of what he does.

Even if you can't apply his techniques directly to your business, it will really reshape how you attack your copywriting.

Follow his newsletters - you will find yourself reading them to the end more often than you would like. He pretty much helped AppSumo kick arse for years. He also helped another of my friends whose now in Y-Combinator smash his email marketing conversions.