Let's talk about "farming"......
As far as I'm aware, I can see nowhere in the rules, or the terms and conditions, where it says farming is not allowed. There are several vague comments about iGP being allowed to do anything they want, but nothing specific to farming. I'd suggest you update your rules to put this specifically in.
My next point, what is farming? In Jose's post it talks about farming leagues, which is fair enough. However Jose has now stated that not setting up in an active league would class as farming. At what point does that class as farming, if I don't set up for 3 races? 5 races? At no point does anywhere in the game say you must set up for every race. I'm guessing that is because it wouldn't be a very good tag line to get people to download the app...."If you don't set up every race, we will take all your tokens away, and possibly suspend your account"
I think you need to make people aware that any drivers created by what you class as "farming accounts" will be deleted if found, even if they have been bought by other people, who may not have been aware it had come from a "farming account".
After your announcement, I just presumed you meant from this point forward, but you are now looking at accounts historically. I just wondered how you are going to look through every account to decide if it has been farming at some point? I presume you are looking at every single account as well, and not just randomly picking accounts, or accounts that have annoyed you in some way?
Lastly, as I think I've gone on enough, please don't claim this is done to maintain fair play, integrity and healthy competition. When you created 10 extra levels and introduced XP boosters people could buy, you made it a Pay to Win game. "Farming" can be done by absolutely everyone and so I'd argue it's a lot fairer and gives people who are unwilling to pay, a chance to try and get back competitive in leagues where people have spent money. It's up to you what you do with the game, but be honest about it, this is being looked at because it stops people buying boosters and you don't like that