Anyone who profits from infringement is subject to damages. This includes resellers and service bureaus even though they did not actually create a product.
This motivates reputable resellers to work with original inventors.
How a reseller can determine if a product is a copycat:
If a reseller sells a patent-infringing product they participate in damages to the original inventor. This is why reputable resellers prefer to work with original inventors.
A second telltale is low prices. Copycats generally participate in a hit and run marketing use price competition to gain market share.
During this period imitators freely infringe on patent-pending products knowing that when the patent issues they’ll just go out of business and go copy something else. This is common with LiveO2 copycats.