Simple really.

Open digital download sales again.

Hire some people that have a main job description of identifying and banning botters/hackers/cheaters.

Let them loose finding and banning accounts of botters/hackers/cheaters.

Force botters/hackers/cheaters to purchase a new copy of the game.

Rinse/repeat. Instant increase in revenue.

Please +1 this post if you agree that something needs to be done about the botters/hackers/cheaters running rampant in FFXIV.