The point I’m trying to make is that I have to buy both?
I think you should read the article
Regardless of where a user makes the purchase, the subscription will apply to all linked Facebook and Instagram accounts in a user's Accounts Center
I did and missed that thank you.
Why would anyone pay extra 2 €/month for what is basically minor one-time convenience?
One reason is because Apple and Google make canceling monthly renewal easy, but mostly because people aren't aware they can get better deal in web. It against Apple and Google ToS for an app to redirect their user to website for payment.
The point I’m trying to make is that I have to buy both?
I think you should read the article
I did and missed that thank you.
Why would anyone pay extra 2 €/month for what is basically minor one-time convenience?
One reason is because Apple and Google make canceling monthly renewal easy, but mostly because people aren't aware they can get better deal in web. It against Apple and Google ToS for an app to redirect their user to website for payment.