I buy from Costco because they provide quality goods at good prices. They also have the exact kind of dog food that is recommended for our greyhound. I could care less about their politics; I might add I drive my diesel pickup truck with an NRA sticker there for large purchases, as do many Texans. I don't go to Costco for politics; I have a variety of news sources I read for that.
I read RV.Net for information about RVs, such as this thread about Costco buying program for RVs. It piqued my interest, though I'd probably never use their buying service for an RV. As an Economics teacher, I sure don't read RV.NET for information about Economics. This thread is a sterling example of why NOT to do that! :R