Walk in the Spirit

アマゾン川のような 巨大な 物流の川を表わし、

黄色のマークはスマイルで、
ベストカスタマーサービスの象徴、

と聞いているのだが、

​You've probably noticed that Amazon's logo contains a yellow arrow that doubles as a smile, but did you also notice that it points from A to Z?​

​https://www.businessinsider.com/hidden-meanings-in-tech-company-logos-2014-6#rdios-logo-uses-the-negative-space-inside-the-d-and-the-o-to-show-a-semibreve-and-a-crotchet-two-common-musical-note-symbols-15​

では 下の黄色のライン矢印（ AからZ）は何か？

First impressions would seem to be displaying its distinct meanings. The first thing you will surely notice is its Smile( yellow swoosh ) which represents that it has the best customer satisfaction. 

​https://www.mabzicle.com/2014/03/10-company-logos-with-brilliant-hidden-clever-meaning.html​

However, that yellow swoosh that connects the characters "a" and "z" is brilliantly meant to sell almost anything from a to z.

物流の総取りを意味する、

​​
​https://twitter.com/davidicke/status/1077942251475607552​

​​https://www.electionforum.org/events-2/u-s-postal-service-undercharges-amazon-for-shippingand-loses-1-3-billion-in-3-months-10-shocking-facts-you-should-know/
過大な値引きを強いられ、3ヶ月で13億ドル（1500億円）の損失計上！？