I don't believe it is currently profitable to create a new bot farm. Botfarms happened because you could pay $10 and then win 25 to 50 cents per game in bronze with starter cards. And if you rented a llamakron, you could get it back even quicker. Bot farms were into profit within a week and then it was all free money after that.
Today it would take a few years to make that $10 back and there's a chance you never can because for all they know, bots could be made illegal 6 months from now. People with the skills to build a bot farm have better opportunities with less risk. Those who own the accounts already and have already built bot farms in the past don't even find it worth it to keep them going anymore.
I think the value of this idea is more about encouraging pack buying and new player integration than it is about deterring bot farms. But I don't think that should be forced. So I guess I'm against nulling the null option.
I voted for it though because I want to have the conversation.
RE: Increase price of Spellbook compensate with Rebellion Packs