[inquisitor]

I agree, Vodafone won't make a fortune at € 0.99 for 50MB and this offer is surely driven by competitive pressure. But even today Vodafone can direct their customers into their own networks through the preferred network list (so-called "PLMNsel") stored on their SIM cards (which can also be updated over the air), so upon arrival in another country the majority of customers will wind up on a Vodafone network. Of course some customers will switch to other networks once their phones get outside Vodafone's coverage and so may generate losses, but in the end this is surely cheaper than an exploding customer-churn rate in favour of Meteor.