Wording is very important.
The reason some of these replica companies can remain in existance is because of wording. Several popular replica sites say things like, "Quality eyewear inspired by Oakley." Plus the word "Oakley" itself is not unique enough of a word to be infringing. It's like the word "sky". Skyy vodka had to add a "Y" to their name to be able to trademark it. Oakley can refer to a city, town, someone's name, etc., so saying their glasses are "inspired" by Oakley is too vague to be litigous. You just have to be careful which sites you purchase these items from. Check the wording very carefully to see if they are leading the buyer to assume that they are "imitation" Oakley Sunglasses or just sunglasses that are inspired by Oakley. Every idea was inspired by something else; it's only the extent of inspiration that differs. Look at food and beverage products. Stores can have there own brands that use the same ingredients, even similar labelling, and sell them for a reduced cost, and consumers are "eating" it up. (sorry about the pun.) Bottom line: if you feel like you are doing something illegal, you probably are, so just don't do it. (Unless you're a lawyer, then go ahead!)
The reason some of these replica companies can remain in existance is because of wording. Several popular replica sites say things like, "Quality eyewear inspired by Oakley." Plus the word "Oakley" itself is not unique enough of a word to be infringing. It's like the word "sky". Skyy vodka had to add a "Y" to their name to be able to trademark it. Oakley can refer to a city, town, someone's name, etc., so saying their glasses are "inspired" by Oakley is too vague to be litigous. You just have to be careful which sites you purchase these items from. Check the wording very carefully to see if they are leading the buyer to assume that they are "imitation" Oakley Sunglasses or just sunglasses that are inspired by Oakley. Every idea was inspired by something else; it's only the extent of inspiration that differs. Look at food and beverage products. Stores can have there own brands that use the same ingredients, even similar labelling, and sell them for a reduced cost, and consumers are "eating" it up. (sorry about the pun.) Bottom line: if you feel like you are doing something illegal, you probably are, so just don't do it. (Unless you're a lawyer, then go ahead!)