xbone and ps4 cater to the same audience in the US, switch is totally different. all you have to do is look at the december amazon rankings, switch destroyed the xbox family, yet it out sold it by a very little. 

Software Ranking (12h from last update) :

1 (-) - NS - Super Mario Odyssey - 3 (-) - 48.66$
2 (-) - PS4 - Shadow of the Colossus - 4 (-) - 39.88$
3 (-) - NS - The Legend of Zelda: Bretah of the Wild - 10 (-) - 56.99$
4 (-) - NS - Bayonetta 2 - 12 (+2) - 59.88$
5 (-) - NS - Mario Kart 8 Deluxe - 13 (+2) - 58.99$
6 (-) - NS - Kirby Star Allies - 28 (-) - 52.76$
7 (-) - PS4 - God of War 4 - 29 (-) - 59.96$
8 (-) - PS4 - Monster Hunter World - 30 (-) - 59.88$ (out of stock)
9 (-) - PS4 - Call of Duty: WWII - 32 (-) - 48.99$
10 (+2) - NS - Donkey Kong Country:TF - 39 (+3) - 59.99$
11 (-1) - NS - Nintendo Labo: VK - 40 (-) - 69.99$
12 (-1) - NS - Splatoon 2 - 43 (-2) - 59.88$
13 (+1) - 3DS - The Legend of Zelda: A Link Between World - 44 (+1) - 20.22$
14 (+2) - XBO - Call of Duty:WWII - 46 (+2) - 50.68$ (+0.13)
15 (-2) - 3DS - Pokemon Ultra Sun - 47 (-4) - 33.33$
16 (-1) - NS - Mario + Rabbids: Kingdom Battle - 49 (-3) - 49.74$
17 (-) - XBO - Monster Hunter World - 51 (-) - 59.88$
18 (+4) - PS4 - Far Cry 5 Steelbook - 56 (+8) - 99.99$
19 (+1) - 3DS - Pokemon Ultra Moon - 57 (+2) - 35.00$
20 (+1) - NS - Dragon Quest Builders - 59 (+1) - 43.65$
21 (-3) - NS - Dark Souls Remastered - 61 (-4) - 39.99$
22 (-3) - PS4 - Star Wars: Battlefront 2 - 62 (-4) - 32.47$
23 (+1) - Wii - Mario Kart Wii - 63 (+8) - 35.75$
24 (-1) - PS4 - Titanfall 2 - 65 (+2) - 10.15$ (-0.32)
25 (-) - PS4 - God of War 4 Collector - 65 (+11) - 149.99$
26 (+6) - PS4 - Dynasy Warriors 9 - 75 (+19) - 59.96$
27 (+2) - PS4 - NBA 2k18 - 77 (+12) - 41.94$ (-0.05)
28 (-1) - XBO - Madden NFL 17 - 78 (+5) - 10.99$
29 (-3) - NS - Arms - 79 (+2) -52.99$
30 (+4) - PS4 - Kingdom Come: Deliverance - 80 (+18) - 59.99$
31 (-3) - PS4 - Overwatch: GotY Edition - 83 (+4) - 38.67$
32 (R) - NS - Pokken Tournament DX - 86 (R) - 53.94$
33 (R) - PS4 - Call of Duty: Infinite Warfare - 88 (R) - 13.51$
34 (-1) - PS4 - Dissidia Final Fantasy - 92 (+4) - 59.88$
35 (-4) - NS - Skyrim - 94 (-1) - 53.54$
36 (-6) - 3DS - Detective Pikachu - 99 (+9) - 38.20$

Stuff that happens in your mind doesn't count. 

Apparently "Sony fans" have since March so nothing new. 

It seems that the Sea of Thieves beta access for preorders did push the its sales significantly. Digital and physical are sitting at 392nd and 124th respectfully. I still expect it to do relatively well though and get back into top 20 near launch.

Just look in the recent comments in this thread lol... 

I think the problem here is the lack of understanding and being a little to uptight.

Having a discussion about the possibility of their being an offset in data on Amazon isn't an attack on any platform. What's being discussed is that there doesn't seem to be a perfect correlation between Amazon rankings and NPD data. 

If you want to get upset over that then that's up to you. Instead of you and jranation's passive aggressive behaviour, why not join in the debate instead of persecuting a fanbase. 

Amazon has never, and will never, be representative of how 'big' or 'little' a certain console wins by. It's just an indicator of who wins and that's it. As the poster you quoted pointed out, Amazon has only been wrong 3 times and even that is debatable when you realised 2 of those times was because of preorders. This is why I added the '*' for 'Does not affect this month'. These months become unpredictable because we can't know how many console are going to be added from previous months. Other than that though, Amazon is bang on.

If I was asking for racing tips to put money on a horse and a friend of mine was this accurate, I'd start wondering if he's got insider knowledge and taking out loans in order to up my bets. 

if thats the case then you are ignoring reality, there is no way in hell amazon can predict small wins by 5-15k it was pure luck considering how big the market is.

Amazon predicted a win ... it won

Reality.