Good question! No, I have never used those bookmarking buttons.

But I do have a "Share" button for Facebook, even though I am not on FB myself anymore (since about 4 years ago). But many reasonable people continue to use FB and I do get visitors because of the Share button.

We still include a LinkedIn link in our email footer, but I don't think we should anymore.
We want people to interact with us directly, why would we point them to a separate network.

Yes, had them. Not anymore.

For a while, it was a multi share button, I think it was "AddThis" as you mention. Then just used Twitter and Facebook buttons, but decided to remove them. I never really believed in social networks sharing for traffic, still decided to try but the results were not convincing to me, as it's not traffic that effectively turns into something useful for me; I noticed most sharing took place due to novelty or quick impact (emotion), this means a quick reaction... not because people actually read the articles.

Decided to play around posting articles that had traffic impact, then explored with and without social sharing buttons, and confirmed several times that I didn't need them (but at least that's my case, and others that I have read).

Another reason why I removed them it's the amount of code and it's impact on website speed (don't forget tracking). What looks like a simple include and tiny piece of code (or image), literally pulls a lot of code from the "mother sites", it's a lot, ugly, slow, and impacts the website speed, so no thanks.

I use the share at:

[developer.mozilla.org...]

Scroll down to examples - the first example is a basic one that I use.

No code bloat and has the added ability to share to nearby devices as well as FB, X, etc.

There was a stage a while back where there were questions over tracking, and that put a lot of people off.
I block the share tracking with FB.
You should take a look, it's rife.

Importantly, if it benefits your site or business, that's fine. If it only benefits the social site, than no thanks.

I decided not to bother in the end. I just added all that open graph stuff to the header so the posts look good, with big images, if people do decide to share the links on facebook and twitter

I'm using AddToAny buttons.

I've never used any kind of sharing button, but pinterest users seem to have no trouble figuring out how to link to me. (No, I don't know why pinterest in particular; demographics maybe?)