This issue is preventing me from purchasing Parallels Desktop. I simply cannot justify purchasing adware. Parallels, you cannot have your cake and eat it. Either make your software paid, or make it ad-supported freeware - not both. The adverts are simply in an awkward marriage with a paid product.
Litmus test: What is your competition doing? VMware Fusion does not include adverts. Virtualbox does not include adverts.
Parallels Desktop lacks the professionalism warranting a 'Pro' edition. It is highly unprofessional to display adverts in your product. It's like a relic of the early 2000s. Picture this: You're demonstrating something to your clients, and all of a sudden a special offer pops up. You look like a fool.
Now, let's carefully scrutinise the response from Parallels staff:
The first justification is that the adverts can be turned off. Expressed at this level of generality, the assertion is false. The ads cannot be turned off. They can individually be turned off, but that does not prevent future adverts from displaying. This justification does not address the root criticism: the software should not have ads at all, in the first place.
The second justification is that the adverts are somehow helpful to users. This is a highly contestable statement. The software being offered has very little relevance to Parallels, and a lot of it is crapware. You know where you could put these offers? In an email sent out to subscribers, to which they can opt-out of, or filter, such emails.
Let's look at the real justification for this: you're getting paid for those ads, aren't you? Just be candid about it. You're double dipping. You're charging for the product while you're also selling your user's eyes to advertisers.
Remove this pathetic bug and fire the person responsible for it.