Artist's page/popular media.

Lately i discovered something rather interesting.I sometimes look at my artist's page and in the popular media tab there are the best sellers in the top 2 or 3 rows,but in the rows below there seems to be all kinds of random footage which alternates every few weeks or so.For example what is showing right now as my most popular footage below the top (in sales and views) is footage that has had no sales or views at all.Is this some kind of promotion or search trending done from the pond5's perspective or is it truly random and should really not pay attention to it at all?