The Federal Trade Commission accused a shadowy group of flooding Ticketmaster with fake accounts to purchase and resell tickets to concerts by Taylor Swift, Bruce Springsteen and other top artists.

Key Investment Group said the FTC is misapplying the Better Online Ticket Sales Act, a 2016 law which it said was meant to target malicious software, not legitimate resale businesses. Key Investment Group sued the FTC in July to try to prevent the agency from using the law against it, saying it uses human employees — not bots — to buy tickets.