[miki123211]

This actually makes sense to me; if you're an artist selling tickets on Ticketmaster, it's in everybody's interests to let you show ads for those tickets to your fans.

If only the Ticketmaster team could show ads on that domain, all these ads would have to go through their marketing team (and use ticketmaster's budget, with all the accounting and invoicing this requires), which would massively slow things down.

Instead, it seems that Google has some kind of protection where ads mentioning Ticketmaster must link to their official domain, to prevent things like this from happening. The scammers just found a way for that domain to display arbitrary text.