It is a pity when people does this. Whine when they missed a deals. How could they not know those major sale days highly likely to have sales on every facet of their live. Do I whine when I miss a deal? No because there is always a deal next time. It will never be the last deal. Honestly, there is no middle ground to please every one.
I can understand why some users have a problem with it due to popups during the game which cause them to leave the game. Yea, that is an issue that need to be fixed. Popup should only popup after starting up Eddie, not during Eddie entire session. Or show the popup as a background and flash the icon in the taskbar, so that why it is out of the way at the same time, it is noticeable that might need attention.
AirVPN is firstly a business. Businesses do this all the times. It didn't matter the specialities of the product, they still do it. Because business need to retain their consumers and gain new users. It is business 101. I rather to have AirVPN to advertise their deal in Eddie popups than doing NordVPN way by sponsoring thousands of YouTubers. Those sponsored YouTubers are parroting from script that is likely made by NordVPN and it is clear as their eyes telling YouTubers don't know what to do with it. I been seeing NordVPN mass-sponsorship and ads in YouTube since June, I become suspicious of it. And my gut feeling is correct when that new of NordVPN came out.
It still a privacy product, a privacy product is showing you there is a deal. By doing so, you will likely to retain their service.