Don't know about top ones, here's list of Sextoy/Penis Enlargement sponsors I know:
Pimproll has Toy Store -
Dildo Planet 
Hustler Cash has Sex Toy & DVD Store -
Hustler Hollywood
XPays has
XSextoy Store 
Score Cash also has online Store -
eBoobStore
Pure Meds pays $20 per free Penis Enlargement pills bottle
OA Internet has variety of Penis Extenders, Enlargement Pills & other meds
Leading Edge Cash also has choice of Pills/Meds