What kind of mentality is this? This is clearly not a drupal mentality to add the footer link. In case you haven't noticed, Drupal is one of the few open source application which doesn't add a footer link.
Some theme designers add their footer, this ubercart module is the first time I see it done by a module.

I understand the goal : create awareness of ubercart in search engines results by increasing backlinks with selected key phrases. This is a goal, and that's fine. What I don't understand is the extremism of some users who defend the idea of having a link in the footer for ethical reasons.. This is lame thinking, Drupal proved to others (like joomla) that an open source application doesn't need to put a footer per default in order to create good will.

Now, I want to remove the link, and what do I have to do? hack the module file? ok, I'm gonna do it, but please... if ubercart need this to create awareness, it means it's lame. If it's not lame, then awareness will happen. Don't force it on developers!
If you care so much about search engines awareness, then ok, go on with this, but please don't mix any ethical philosophical stuff in it. I don't owe anything to ubercart even if I use 1000 times without mentionning it.