Yes, the first release had a solid price, because i was planning for the physical release and I feel a downloadable game being free may reduce the desire of purchasing the physcial one. Months after the physical release, I decided to drop the price to pay what you want.
Thanks for clarifying. In BrewOtaku #003 we had the game marked as paid, which now led to confusion. We are going to release #003 for free soon, though we keep the status as it was back then.