Recommendation for prepaid surfstick in multiple countries

[inquisitor]

Wow, this is indeed very cheap, actually cheaper than domestic data rates in some EU countries. But the following sounds like this option is not only reserved for postpaid customers but even subject to longterm agreement so you can't unsubscribe until your contract ends:

De minimale duur van Internet Europa is gekoppeld aan de minimale duur van de overeenkomst.

Are these conclusions correct?