That was a very interesting read, especially this part:
We’ve identified over 800 victim websites from Magecart’s main campaigns making it likely bigger than any other credit card breach to date. In the case of a single, highly-targeted campaign we dubbed SERVERSIDE, we identified nearly 100 top-tier victims, mainly online shops of some of the largest brands in the world.
It will be interesting to see which other companies other than Ticketmaster have been breached. Some of the third party tools that RiskIQ identified to be compromised claim to be serving over 10,000 websites!