I'd like to add, that I have also used cornercard for years and been happy with their online access. And...
Recently they changed some of their online security and I can now go to a foreign web site. Buy something using foreign delivery and statement addresses (for a relative abroad), use foreign details for all contact etc and only at the final stage enter my credit-card password via the cornercard security site. This is a huge improvement over some older credit cards I had where there was always a problem with addresses in one country and delivery in another.
Made purchasing very simple. Don't know if other cards work in a similar manner or if this was unusual due to the host/purchase web site.