While wikis that don't display Template:Wikia_Gaming_Footer should be removed, 'small' wikis as you put them have every right to be,long on that template if they display it. Please do not remove such wikis from the template.
Oh, I remember now. At the time, the template was split into two section, 1000+ at the top, <1000 below a hr, I had been actively moving smaller wikis below the line, but then someone - without discussion - merged the two sections again.
After that, the template was split into a subpage, and I completely forgot about following it so haven't been actively policing it recently.
As it turns out, only 1 of those 3 smaller wikis display the footer - so I'll add it to them.