Initially the online site either didn’t have 3rd party sellers or it was very limited. But now those have taken over a lot of categories and products, making the Target website as hit or miss as the others, so there’s no real incentive for me to check them out when I’m shopping.
I find this experience particularly annoying. I go to Target.com to find stuff sold by Target. I don’t need another place for random no-name companies to hawk their wares. Especially since a lot of it just seems like drop ship crap.