Klarna launches Klarna Plus, a $7.99/month subscription plan in the US, with waived service fees when using its One Time Card, double rewards points, and more (Hugh Son/CNBC)

Hugh Son / CNBC:

Klarna launches Klarna Plus, a $7.99/month subscription plan in the US, with waived service fees when using its One Time Card, double rewards points, and more  —  – Swedish fintech firm Klarna is launching a monthly subscription plan in the U.S. to lock in its heaviest users ahead …