"In addition to the new rating system, Netflix has new match percentages (up to 100%) to more accurately predict how much users will like something.
...
The new rating system received 200% more ratings in A/B tests, according to Netflix VP of Product Todd Yellin.
When it comes to rating movies and shows, stars reflect the preferences that people want to have, rather than how people actually behave. Todd gave the example of users giving 5 stars to a documentary but just 3 stars to an Adam Sandler movie that they watched over and over again. “What you do versus what you say you like are different things,” said Todd."
An alternative vertical tab bar I discovered some time ago is Tab Center (https://testpilot.firefox.com/experiments/tab-center).
Although still a little buggy, I switched over from Tree Style Tab. It feels better IMO and I really didn't care about the "tree style" of TST, I just felt the need for a vertical tab bar.
When I was in the same situation some time ago, I used https://www.mail-tester.com/
With the score around 7 or 8, Gmail didn't mark it as spam anymore.