Is it possible to get web push server specifically tailored to needs of my business?
Yes. We can offer custom design and coding with respect of needs of your business.
Why is there no push notification subscription banner in browser incognito window?
In general, there is no option to subscribe in a browser's incognito window. Such behavior is caused by the way browsers work. That is why the push notification subscription banner is hidden to prevent user mislead.
Why enable push notification button is not working in HubSpot Content editor?
In general, there is no option to subscribe to any site displayed in the iframe tag. That is how HubSpot content editor shows any page. Such behavior is caused by the way browsers work. In other words, in the Content Editor, it's impossible to subscribe, but in a new window outside Content Editor, it works. See screenshot
Why has WebPush failed to install on my HubSpot account?
WebPush requires CMS Hub included in your HubSpot portal. CMS functionality enables a push subscription module which allows gathering subscribers for push notification. More about CMS Hub
Why the number of subscriptions has been reduced after sending push message to all subscribers?
Subscriptions credentials are bunch off crypto keys given by a browser. If user unsubscribe from push notification this keys become invalid even when user would change his/her mind. Every new subscription or resubscription gives us uniquely new keys. The only way to validate active subscription is to send push notification to the user. So it's only chance to clean up database from invalid subscriptions. That's why we delete inactive subscriptions after sending push message to all subscribers.