I have a hunch that the "Top Sellers" lists on bb.com are skewed.
#1 ball is the Pyramid Pathogen X....ok maybe nothing major here at a glance but If I remember correctly, the #1 spot has been a Pyramid ball forever.
All top 10 bowling ball bags are Pyramid brand...really....
All top 10 shoes are Pyramid minus #8 spot for Dexter Mens Ricky III....hmm...
23/30 spots on the 3 top 10 lists are Pyramid brand. Speculation here but does seem skewed.
Now, why do it? Well easy marketing of course. If people see something as a top seller, most people will say "oh it has to be good as everyone else is buying it."
Not knocking Pyramid products quality in any way...just stating an observation.