Walmart is in fact even worse to 3p sellers: they will remove your offer if they decide it's too expensive, which tends to be (from what I hear from active sell

Walmart is in fact even worse to 3p sellers: they will remove your offer if they decide it's too expensive, which tends to be (from what I hear from active sellers) in the double digit percentages of the time. They monitor against other sites and may remove if yours is too much more than other sites.