I mean spammers can (and do) get more fancy with e.g. detecting the source AS and its owner for cloaking, but I guess the spammers here are using geo location f

I mean spammers can (and do) get more fancy with e.g. detecting the source AS and its owner for cloaking, but I guess the spammers here are using geo location for a veneer plausible deniability that they're not specifically targeting Google.