Why do people post pictures of their baby clothes/furniture/car seats on here for all the mamas to…

Why do people post pictures of their baby clothes/furniture/car seats on here for all the mamas to see, then delete the comments of people asking "oh where did you get that it's so cute" or "how did you this or that". I see mamas doing that all the time on here and it drives me nuts. Like most of us literally live thousands of miles away from each other, it's not gonna be like showing up to a party in the same dress if you tell another mom where she can find the same car seat you bought 😂😂