This is totally obnoxious. I have almost two years left on my subscription. How long do I have to see this? If I want to purchase this I will go to my central account.
A simple answer to your question would be: in the next two years of your subscription or until you buy it...
Personally, i also don't like it, but there's nothing more we can do about it. Maybe the dev team will consider moving this ad from the Bitdefender Total Security program.