When MS was saying the XBone was sold out when it wasn't, and pics like mine were everywhere on the internet, and there are stock trackers all over the internet saying which retailers have what in stock that testify about those pics, yet MS still told everyone that they were sold out at retailers: yea, I was that guy.
Yikes, you're still confused on all of that. I'm not really going to bother trying to help you understand that MS comment, but you still don't know much about how retail works.
You are completely wrong, though. If you "put signs up for product that will sell and that you have in stock" there'd be a PS4 sign as well, considering they had them when I went there and they obviously didn't only get a shipment of 3 (and there'd be signs for all the electronics that sell well and they have in stock). You make people aware of an alternative when you have plenty of it and are sold out of the first option. "Hey guys, we know this one product is selling, but we do have this completely viable alternative on our shelves". If my WalMart is sold out of Sprite, I'm gonna buy a Sierra Mist, for example. And like I explained before, video game consoles are not commodities. If I want an XBone right now, I'm not gonna go into the store, see there's a bunch of stock and think "welp, guess I don't want it anymore. I can get it later" just like I wouldn't go "I'm not gonna get Sprite right now since I can get it later". That's just damage control to say that people seeing the product means people don't want the product right now. You don't walk into a store with $500, see the product that you want, and then not buy it....because you have the opportunity to buy it. Video games are not "need" items. They are "want" items. And nobody postpones a "want" item when they have the means to get it. If I want to play an XBone right now, I'd get it, not wait until there's 2 left and say "oh, there's not many left, I should go get it". That kind of tactic only works for impulse buyers with money to blow, not people that walk into the store knowing they wanted an XBone.
Look at how many times an Amazon thread for PS4 came up here. With 1000+ in stock. Was anyone saying "hey, there's over 1000 in stock. Guess I don't need to buy this right now"? No, it sold out in a few hours.
Your mistake here is you are comparing an item with ample supply like the Xbox One, to an item that is having supply issues like the PS4. No, you don't set a sign outside because you have a shipment of PS4's because it might be the only shipment of PS4's you get for 3-4 weeks and there is no point. Not only does a supply constrained item not NEED a sign, but then you run the risk of the sign being up and you don't actually have any PS4's. I experienced this at a few retailers over the holidays where they had signs in the electronics sections for both consoles and didn't have either in stock and overheard a lot of pissed soccer Mom's.
Impulse buys are a huge part of retail, especially during the holidays and tax return season. This is just another area of retail you clearly don't understand. You contradict yourself here too, why would anyone who "wants" a PS4 go into the store and decide on a whim just because they are out of PS4's that they will get an Xbox One instead? Unless, of course, like I said, people are fickle about what they purchase. And if someone is going in determined to get a PS4, are they going to be more likely to get an Xbox One instead if they see a stack of 60 or however many you said? That would just make most people wait.
The cherry on top of your retail insight is comparing online to real world that you actually see. That is, of course, completely disregarding the fact that the PS4 is supply constrained. Nothing more really needs to said here lol.