Allow enable/disable plans features without commissions/fees.

It wold be great allow upgrade/downgrade premiums services by months without
commissions charges paying a suscription plan while you need it.

Some banks in Spain have a traveler card. You can use it as normal card in the country, but if you plan to travel, you can activate a fee during your travel (monthly plan) and when you come back to your country you can disable it (without charges or commissions when change the plan.

Some banks in Spain have card with this feature. You can use it as normal card, but if you are planning to travel, you can activate it with a month fee during your travel and back to normal card when return .

Obviously when you activate the travel features you have some advantates that are not actives when you are not. You can active or desactive by month, and you have no charge when active or disable the feature.