Per another article : Europol und Eurojust, were able to attribute to the criminal network more than 1 700 individual cyber fraud cases in Austria and 1 500 in Latvia, with a total loss of several million euros. The financial loss in Austria alone amounts to around EUR 4.5 million, as well as EUR 420 000 in Latvia.

So I guess they were providing legitimate business while doing scams at the same time.