HBO is spending a rumored $5.6 BILLION on this new Harry Potter series but Jason says… it’s actually a smart bet. The “Potter” show reportedly costs $100 million PER EPISODE. That’s around 20x more costly than Season 1 of “Game of Thrones”! How could HBO Max subscriptions alone possibly make that money back. On TWiST, @Jason notes that the lifetime value of a hardcore Harry Potter fan is well above $1000. If this show creates 5 million die hard “Potter” fanatics, it earns that money back just…