Found this, although it looks like they already shut down premium tickets you can open a regular ticket and hope for the best, i just did.https://buy.xmarks.com/support.php?cmd=showfaq&id=6426
edit: As a post script thought on the entire matter; i wonder what will happen to all my data - and note i mean not just my bookmarks, i mean the records of my entire history including im sure access logs, change logs, billing logs, etc. Data once written rarely gets erased, so where will the data end up resting? All the countless backups? I feel the possibility of a short sarcastic commentary years from now, tracing the travels of your xmark data from company shutdown to current day.