Keep in mind that effectively TM/LN sells tickets on the secondary market.
Just because tickets are on the "resale" market doesn't mean they were bought by Jane Doe and she can't go anymore so she's re-listing them. For some concerts only 8% of the tickets are actually available at the listed price, the remaining 92% are all available either as a special offer (credit cards) or given to various individuals associated with the event (such as the headliner) who can then immediately put them up for resale.
Just because tickets are on the "resale" market doesn't mean they were bought by Jane Doe and she can't go anymore so she's re-listing them. For some concerts only 8% of the tickets are actually available at the listed price, the remaining 92% are all available either as a special offer (credit cards) or given to various individuals associated with the event (such as the headliner) who can then immediately put them up for resale.