We have no idea why they targeted these populations. Any guesses are pure uneducated speculation, and we have no right to be making such negative assumptions about others.
Amongst other things, the assumptions being made here are absolutely ridiculous! We are talking about a population (the Orthodox population) that has been taught to be super-careful about doing anything that resembles stealing!
The average person in the US does not have the concepts of honesty that we have.
I once took a taxi to a Shloshim. I was running late and had trouble finding the place. In my confusion, I forgot to pay the driver until I was already there and I couldn’t leave in the middle. When I got back late at night, I called the taxi driver and tracked him down. We arranged that when he was in my neighborhood, he would call me and let me know so I could go down and pay him. As I handed him the money, I apologized profusely. He said, “It’s fine. As soon as I saw you forgot to pay me, I knew that you would find a way to get the money to me. I know that YOU (this was in hebrew, so he used the plural for you, meaning that he was referring to Chareidim in general) go to the ends of the earth to pay someone back a few shekalim!
Apparently it is known that Frum Jews are exceedingly careful about honesty. Take it from a typical not-religious taxi driver in Israel who has enough experience in these matters to know!
If you want to see more about the honesty of Frum Jews, google the words, “Rabbi Craig’s list money”.
If someone is not Jewish and hasn’t been taught the things that we are taught about honesty on a daily basis from the time we are young, there would be no reason for them to be extra-diligent about honesty. The natural attitude is “if you can get away with it, why not?” I once worked for a not Jewish telemarketing company. I was concerned about the honesty of some of the things that were done. When I expressed my concerns to my supervisor, she told me that it was legal, and she couldn’t understand why that answer didn’t satisfy me. If you haven’t had a Yeshiva education, your attitude is going to be “if it’s legal and I can get away with it, why shouldn’t I do it?” Contrast that with the average Yeshiva graduate who is inundated on a regular basis with stories of Gedolim who were super-stringent about matters of honesty.
One of the most commonly told over stories is the famous story of Rav
Yaakov Kaminetzky Zatsal. When he was given a gift, he went to the pawn shop to have it evaluated so that he could make sure to pay taxes on it.
Did you ever hear of someone other than a Frum Jew doing such a thing? Do you think these are the kinds of things they teach in public schools? In public schools, the subjects taught are: History, Math, Science,etc. In Yeshivas, day schools, and Bais Yaakovs the main subjects taught are: Ethics (Middos) and Values (Hashkafa). These subjects don’t make it into the curriculum in the average public school.
My automatic assumption when reading the OP was simply that the company would like to institute this policy in general (the no return policy) but was concerned that people from other communities will be reluctant to buy if they know their only option is to make an exchange. Since they are not yet familiar with the company and are not yet regular customers, they do not yet know that there this is a company at which they will be likely to find something else they want. The company is still trying to gain these people as customers so they have to institute policies such as this in order to win them in.