<…> instead of making Bitcoin a means of payment, a Swiss company is converting Bitcoin into a kind of voucher so that its users can spend Bitcoin indirectly.<…>
I figure that what they are talking about is this:
https://www.vaerdex.ch/products/cryptonowCointelegraph’s article states that:
Presently, the options available to them would be to redeem the vouchers via an exchange service or sell the BTC amount loaded on the card using one of the 70 Bitcoin ATMs operated by Värdex.
You don’t really spend the bitcoins directly. Infact, you purchase the voucher for x amount of CHF, but you need to activate it in order to convert the CHF to bitcoins. Activation is performed for a fee between 2,9% and 5,9% (depending on the actual reseller).
The card itself has a private key and a public key (you need to trust that the privte key is indeed known only to you). Similar therefore to a paper wallet in a sense, not acting as a card to spend your bitcoins directly at a store, but rather to store them (or redeem them as stated in the above quote).