It's nearly impossible for the editors to keep every page up-to-date. Research is needed to find the appropriate replacement.
To help, the developers of the wiki software have created a "maintenance" script which finds broken links across the entire wiki. Instead of randomly running across a broken link, a wiki editor can simply look at the list and select articles of interest.
Due to lack of our editors' available time, I'd like to ask our members (and lurkers) to help keep the wiki's links up-to-date.
The list is in this page: Bogleheads:External link maintenance
All that's needed is to scroll down to an article that looks interesting to you, find the broken link in the page, then locate a suitable replacement. Once you find a replacement, post the new link here and an editor will update the page.
Go to Credit cards and look for the link. (View source to find it easily.) The link is the second entry in the table under "Everything else". What should the replacement link be? Is this credit card still available? If not, should it be removed from the table?
All of this takes time - which is in short supply. For this reason, we'd appreciate any assistance provided by the members and the lurkers (viewing the forum but not logged in).
Forum members are encouraged to post corrections here or in this Bogleheads® forum topic: Suggestions for the Wiki
Readers without a forum membership are welcome to post corrections in the Help improve this page feedback form, located at the bottom of every wiki page (not visible in mobile view). No logins are required. Answer Yes or No, then enter your suggestion in the box provided.
To the software crowd:
This is a python script bot which uses the MediaWiki API. If you are feeling adventurous, feel free to replicate the list on your own. The script is read-only, no account required (make one up on your own - it will work). If anyone has a question, just ask. I ran the script on my home PC in Linux.