I'm not sure what you are trying to do exactly?? I've used Titanium backup for years and I simply restore my user apps after a ROM flash. I've never needed to restore market links.
However, you should ask in your device section, assuming by your signature you have a Nexus 4....here...
Or try the general Q&A section, since its probably not specific to your device.
Another good place to check would be the app developers website. Should list the site on their play store posting.
---------- Post added at 11:02 PM ---------- Previous post was at 10:56 PM ----------
I do see a setting in titanium backup under preferences, for automatically saving market links when backing up. Make sure that is checked.
Any further questions, please post in your device section or general. 👍