Well as per article yes, but 600$ is the reporting limit. If Ticketmaster, stubhub and so on has a reseller account with sales income of more than 600$ per year, they have to file it to IRS. Whether its single sale or thousands of separate small sales doesn't matter.

Completely normal tax procedure. Pretty much all big such platforms of various fields stock exchanges, commodity markets etc. have such obligation ledges on them for avoidance of tax evasion.

Nor as second note is anyone being "punished". Punishing is what happens on breaking law. This is business taxes, you make profits selling stuff, income taxes start applying. Normal cost of doing business in society for the services society provides (national military keeps the Mongol horde from wrecking your business and so on, transport atluthority builds roads to run business trucks on so the music tour entourage can get to the arena, so one can sell tickets to that conce for profit and son on).