When you say "spam" do you mean scammers and shady offers, or are you referring to legitimate businesses setting up a brand identity?
If they're legitimate businesses, then either make it clear that you don't offer business accounts or give them a different set of plans, maybe charging money for some plans.
If they're scammers and shady offers, then the ban hammer is appropriate since they're violating your rules.
If they're legitimate businesses, then either make it clear that you don't offer business accounts or give them a different set of plans, maybe charging money for some plans.
If they're scammers and shady offers, then the ban hammer is appropriate since they're violating your rules.