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The problem is that it is very disrespectful to ask here for free support, developers are helping and you then show them with your log lines that you are installing hacks to not have to pay for a paid "feature" you care about, as you otherwise wouldn't spend time in removing the nag.

And it already happend in the past that such an anti-nag-hack broke a Proxmox product after an update and people then wasted the staffs time asking for support to fix a problem they caused by themselves. So I'm not convinced with the "no harm caused".

For me thats like pirating a cracked software and if you do that ita very bold to ask for support.

I meant no harm caused by the inquiry, I do not count hurt feelings, we are all adults. But to address what you mention now ... it may well be so that (wasting staff time), that's inevitable by the very design of the popup and that some people hate it. I just find it very funny that I personally that happen to be able to remove it without git pulls, didn't bother to do so as it's not bothersome. But if it's extra load on support (in those cases you mentioned that people do not disclose they have 3rd party patched thing), I am afraid the banner would have been better for everyone in that sense. It's human nature.
 
This is the official Proxmox forum. The official method to remove the popup is to buy a subscription.

It takes 5 minutes to Google and implement the simple, unofficial, and unsupported modification that removes the popup.

I find discussing it and rationalizing it and justifying it on the official forum is disrespectful whether you are using PVE commercially or not.
I heartedly disagree. The nag is akin to the pop-ups on websites from the 2000's. From a UX design perspective, anything that takes away the ability to click around something offered for free asking for money just emboldens people to find ways around it. A banner gets the message across just the same.

And all links in the product bring you here. I find it disrespectful to point all roads to this forum only to get quickly attacked, especially when the product is advertised as 'free'. I've used Proxmox off/on for ... jeez, almost 10 years now. This post won't change anything, but it comes across as a bit disingenuous to offer a 'free' product but then nag you to death to pay for Enterprise and not have a way to at least 'hide' the nag for X amount of time.