People don't want to use srp let alone type the rules in a txt without a gui. This tool is not for 99.99% (a lot more 9 I didn't want to type) of home users. People wouldn't use it even if it was free but at €39 for a year of updates it sounds like a joke to even debate it.
Excubits is sure not going to get rich from home users, especially since home users always try to figure out if they can get what they need from the free version. I assume Florian has some businesses that he provides paid support.
@WildByDesign,
While testing the Bouncer Black List, I found out that blocking Shdocvw.dll (I used Hard_Configurator) will make SmartScreen for Explorer dysfunctional in Windows 8+ (no SmartScreen prompt).