Most Construct 2 users are independent developers, many make an effort to buy a license, and I think they are the majority.
Do you really think they will pay for a subscription?
If the bulk of Construct's users leave, it will happen like Stencyl, which will be used by four cats, and ClickTeam and Yoyogames will celebrate it.
You should know that those who pay subscriptions, with exceptions, are development teams that live from creating games, do you really think they will pay for Construct instead of using Unity or EU?
Please do not take it personally, I like Construct 2 and I know that Construct 3 will be a great program, but in my opinion they will lose the majority of users, which are the same ones that have made Construct great.
I have many games created with Construct, I even sold some licenses, more than 40 tutorials on youtube promoted Construct, but if that's the policy for Construct 3, I'll be thinking about Fusion 3 or GM2.
I wish you good luck, you will need it.