Angiel, between now and the beta by April we'll be showing you lots of Construct 3 things
From what I have read of the preliminary plan I just think Scirra is pricing themselves out of business going with such a high subscription rate.
Having run online businesses that needs people to subscribe and stay tuned for new materials I can tell you that very few people will pay $99 a year for a subscription.
I suggest you would make more money having more volume of customers and more customers attracts more customers if you would set your C3 personal license at $50 and $20 a year subscription gets you all the updates and addons and what ever other bonuses you can think of as incentives.
People will get a great deal at $50 for a licensed version and will be alot more inclined to sign up for a $20 subscription for ongoing updates and addons and that is ongoing revenue for Scirra.
To put it in perspective it is better to have 1,000 customers buying a license and subscription at that price than it is to have only a 100 buy the license for more and never subscribe.
Just my opinion!