I use plotly quite extensively. Never needed to pay a dime. Never even needed an account (until I wanted to use their forum).
So to me your critique isn't quite understandable.
So to me your critique isn't quite understandable.
Right now I get the following for most of the graphics on the linked page:
"This embedded plot has reached the maximum allowable views given the owner's current subscription.
Please visit the subscriptions page to learn more about upgrading."
I should have made myself clearer, I was referring to this particular example, where the OP's articles plots don't render anymore.
I know that's how they make money, by making it possible to share plots (or make them accessible) through their own platform.
One could have just* self hosted them with bokeh.
Oh well, to each their own. Maybe they just wanted to show the cool thing, rather than having to worry about all the devops stuff.
My gripe was pedantic, I know.
[0]https://github.com/plotly/plotly.js/blob/master/LICENSE
* with a non trivial amount of effort.