To disable “subscription” ads in the main menu, you must subscribe to the mod in the workshop.
 
After that, the ad will be hidden. The mod is not mine, but I express my gratitude to the author for it!
 
 
https://steamcommunity.com/sharedfiles/filedetails/?id=2755310819 – [steamcommunity.com] 
 
 

How to disable “subscription” ads in the main menu

 
 

 
 
Here we come to an end for Hearts of Iron IV This is how you can disable the Subscription ads located in main menu hope you enjoy it. If you think we forget something to include or we should make an update to the post let us know via comment, and we will fix it asap! Thanks and have a great day!