Question about Digitec iot 1GB data package

I have wondered about that too. I'm even surprised that it's not illegal. Because this card is actually a kind of voucher for a service. According to Art. 129 of the Swiss Code of Obligations, it is not allowed to change limitation periods. Accordingly, such a credit should be valid for at least 5 years.

Isn't it always limited in time? I only know that you buy roaming credit, for example, which lasts for a week. No matter how much you have used, the data volume expires after this time.

So that you don't have to sign a subscription contract just for data, it's exactly the same in holiday homes when tourists buy SIMs for data.