Hi, if you do not link that, so why do not you get licensed version that does not include those? (btw. I do not know why you call it a spam link, it is a regular back link same as in many other Joomla component)
Even on these pages you can see in footer, that this directory is powered by "Mosets Tree".
If want to you use the result of our work for free, I think there is no reason to mind pointing a link to us.