Is using any kind of job board very privacy focused?

At some point you're adding / providing all kinds of personal information anyway.

Lots of scammers on Telegram in my experience (n=1), personally err on the side of caution and minimize footprint there because of it. One should be judicious who they are providing personal information to.

Valid point.

I would hope that the newsletter ends up just directing you to the company directly, not some other rando user. That would be dangerous.

my newsletter goes to company website