For fun I made a Robinhood account. It took me 5 minutes to sign up, get approved and transfer funds for trading...

Here's some details... Read on.

...it took me another 5 minutes to get qualified for options.

If I share a sign up I get "free shares" and I can share as much as I want up to 500$ worth.
The main UI has a prepopulated "list" of stocks/crypto to watch and links to news.
Clicking a stock opens a "trade" button that looks like this.

Notice options is first, buy second.

Options took me to an approval process (which took about a minute) and now away I go trading Baba options.
Buying stock looks like this. It emphasizes fractional shares.
When I click 1$ it looks like this.
The free stock thing. I couldn't believe it. The first one is LITERALLY a scratch game. You pick one of three...
Scratch it off..
And win!
Boom. I made 3$.
And now the inducement for me to invite friends so I get more scratch card stock games is high. Seriously powerful psychology here.
This is probably the best UI/UX of any investing app I've seen and also the most dangerous.

Fascinating.
For margin.
You have to sign up for "robinhood gold" which wraps a bunch of things into a very game like UI. Its 5$/mo.
Margin rates are 2.5% above 1k.
I had to have at least 2000 in my account so I deposited another 1000 which took seconds.

And I'm good to trade on margin now.

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A brief analysis and comparison of the CSS for Twitter's PWA vs Twitter's legacy desktop website. The difference is dramatic and I'll touch on some reasons why.

Legacy site *downloads* ~630 KB CSS per theme and writing direction.

6,769 rules
9,252 selectors
16.7k declarations
3,370 unique declarations
44 media queries
36 unique colors
50 unique background colors
46 unique font sizes
39 unique z-indices

https://t.co/qyl4Bt1i5x


PWA *incrementally generates* ~30 KB CSS that handles all themes and writing directions.

735 rules
740 selectors
757 declarations
730 unique declarations
0 media queries
11 unique colors
32 unique background colors
15 unique font sizes
7 unique z-indices

https://t.co/w7oNG5KUkJ


The legacy site's CSS is what happens when hundreds of people directly write CSS over many years. Specificity wars, redundancy, a house of cards that can't be fixed. The result is extremely inefficient and error-prone styling that punishes users and developers.

The PWA's CSS is generated on-demand by a JS framework that manages styles and outputs "atomic CSS". The framework can enforce strict constraints and perform optimisations, which is why the CSS is so much smaller and safer. Style conflicts and unbounded CSS growth are avoided.