Beware easy one-size-fits-all solutions
I often go to gigs where I’ve either picked up a ticket through Craigslist or I just buy one from someone at the door whose buddy can’t make it.
A strict CC-used-at-purchase policy would not work for me, nor the people offloading an unwanted ticket. These aren’t sold-out Ariana Grande (horrified shudder) $500 tix. They’re $60-70 tix for indie rock bands at 500 seat venues. Scalping? Not much, though I am sure the TicketMaster-run markup insider websites do their best to fleece us.
Solutions nuking the Ariana Grande or Kathy Perry scalpers need to avoid penalizing listeners of non-shite music.