You can read this manual entry for the explanation of that error:
http://dev.mysql.com/doc/refman/5.0/en/gone-away.html
This mod has received 15 updates since it was flagged stable
It shouldn't, though we haven't explicitly tested this mod on Litespeed.
It's impossible for us to make any form of guarantees regarding the lifetime of the modification, unfortunately. To take it straight to 11; I could get killed in any manner of horrible ways tomorrow, leaving the rest of the team scrambling to support it
On a more serious note: We have no plans of discontinuing support for DBSEO. It's our top priority, and due to the nature of the mod it will remain our top priority for the foreseeable future.
I don't think you should consider the money you spent on vBSEO a waste. You got the functionality you paid for, and the security vulnerabilities vBSEO currently suffers from was not something yourself nor the vBSEO team could have foreseen.
If DragonByte Tech ever closes its doors, or anything happens that would even remotely affect our ability to do business (extended holidays, injuries/illnesses/deaths rendering one of our team members incapable of working for extended periods of time), we would send out a newsletter from our site informing our customers of this.
We would never simply disappear without a word, leaving our customers high and dry. You would always be informed to the best of our abilities, leaving you time to seek alternative solutions if you feel that this is the best course of action for your site.
Fillip