Amazonprime

3 clues
E-tail membership plan
Membership plan for e-tail fans
Service with more than a hundred million subscribers
Similar answers:
Amazon
Amazonant
Amazonas
Amazoncider
Amazondotcorn
Amazonecho
Amazonia
Amazonian
Amazonians
Amazonkindle
Amazonmime
Amazononline
Amazonprime
Amazonriver
Amazons
Amazonvine
Inkalamazoo
Iquitamazon
Kalamazoo
Kalamazooriver