You never get banned for account buying. Sorry if you get assmad over that one guy paying $5 to a chink for an account better than your launch account that you spent a month working on but it's extremely rare for anyone to get banned for account buying if ever.

Realistically, a company can't ever tell if you bought an acc or not because then they would have tons of false positives and form an entire department to sort through all the VPN users, travelers and all that stuff so they try to strongly discourage you from buying an acc but won't actually enforce it.

What they DO ban for is client modifications, 3rd party tools, hacks, bots, exploits and anything that could be counted as cheating. Granblue Fantasy has a long history of people using ""undetectable"" bots then ending up either permabanned or with the dreaded red letter of shame on their account.

Similarly, you can get banned if the chink you bought your account from was botting or automating the rerolls so you have to be careful who you buy from if you do end up buying an account and understand that account buying is a very grey area where you're buying an account from a black market where the guy might or might not scam you so you have to take every precaution possible whenever buying an account for a game and making sure to secure the account so the seller can't take it back or resell it.