It’s different from the privacy tracking widgets. It’s just a link to a little joinmastodon.org web app that helps you share it on your instance. The website that hosts the button (or link) does not load any 3rd party scripts. If you enable the option to add a logo it will add an inline SVG image. The button as seen in the blog is the creation of the blog writer and only adds a bit of CSS to make it look like a button.

The code of the web app is opensource: https://github.com/mastodon/share

The CSS of the button can be found with inspect element.

A company is valued by what somebody is willing to pay for it.

So kind of, yes.

AfD is using fascist manipulation using propaganda (always putting immigrants and immigrant attacks in the spotlight) to gain power and discriminate immigrants even more, causing more retaliation which in turn makes people give the AfD even more power.

In a tolerant society we should not be tolerant of such intolerance.