How is the PC program paid by phone?

Question

Sometimes I download a game (search engine) from the doublegames.cz server for pleasure. Until recently, the payment was made by sending one or two SMS messages worth CZK 99 to the number after 30 free minutes, and then an activation code was sent to the mobile phone, which was entered manually and the game started. This could be beautifully exploited, because the game could be activated on multiple PCs the same day. Probably it did not escape the operator, so now there are several payment options - PayPal, credit card, transfer and via mobile phone and landline. The number is called, the machine voice dictates the activation code and it is necessary to wait for two minutes before a certain amount is used up (2 minutes at CZK 42). Then the game starts automatically. I wonder how it actually works. Thanks :)

Answer 1

I wouldn't say that this in itself solves the multiple activation, am I? it is rather cheaper for doublegames.cz to run an erotic line like this than to use premium SMS - the provider of that line or sms service is cutting a piece of sales and is counting about less for that line