It could also add more optionality to the Shop offerings—allowing the software to be modified with or without the feature prior to delivery.

FYI, the givemesport.com link in your article has a typo ("s" before ".com") and is going to a spam site.

Based on the current feature set, I’d say $4.99 is reasonable and $9.99 a stretch. Unfortunately, I’ll likely pay even if your guesses are correct. Hopefully there’s a discounted annual rate too, like Connect+.