yeah absolutely. I agree with you! I dont like "renting" the software and I dont want to have it be forced on me to be connected to some server. For that reason i dont like or use Stencyl.
But the case with superpowers is quite different. You own the software, it is on your computer- not somebody's server.
But since it is html5, you can also share your project on a localhost with others. It is in no way tied to some subscription model that some company is monetizing.
As far as I am aware the only way they are interested in monetizing it is the asset store, where developers get a cut from all sales they make.
But the files are on your hard drive, the software is on your hard drive, you dont need to be connected or signed in anything in order to use it. You just have the option to be the server. Your home computer can be the server for the developer team you have and its easy to get them to join you- they dont have to install anything.. Just open their web browser, connect to your localhost and type a password if need be. Presto, they are in the editor, its running in their web browser.
There are currently plenty of html5 editors coming out that try to keep hold on the server side and make the user pay for subscription. I think they will all fail because they are greedy and stupid. Their biggest selling point being flushed down the toilet. Developers dont like keeping their stuff on somebody's server they are forced to pay rent for.