I just sent you a PM reply, but will also copy some of that here.
First of all, thanks for your message and for supporting Pinside. Without that support the site wouldn't exist.
I will indeed soon add the long awaited notifications to the list of Pinside+ features. This will be done by means of an app (iOS + Android) and also via browser push notifications. I believe this works on all major browsers (desktop).
Get notified of someone mentioning you in a thread...
When I say soon, I'm hoping around 2-4 months for the app and a few weeks for the browser. It was a bit of a rocky ride as I have been working on a Pinside app for the past three years, going through multiple iterations, which all failed due to the complexity of the project (and the fact that I also have a lot of other work on my plate). Fun fact is that I have actually had working (browser) notifications ready for almost 3 years and have been close to release a long time. But it was never quite 100% ready.
In hindsight, I was probably a bit premature to put it on our Pinside+ feature list (or maybe just too enthusiastic). I apologise for that, it was in no way my intention to mislead people.
Some people asked me about e-mail notifications. Unfortunately, I have no plans of sending out notifications via e-mail because I think e-mail just wasn't build for instant notifications. I fear that the sheer volume of e-mails that would be sent out would a) bring the mail server to its knees and b) quickly get Pinside on all the spammer lists. So it's going to be push/browser notifications only. Unless someone can convince me otherwise
Anyways, thanks for your patience as I really am trying to get this thing to phones and browsers near you as soon as possible!