It's taken, but there are some restrictions for the high ratios (better to make it blurry than laggy) and there are also a settings button allows to force high resolution
There are actually nothing hidden or not transparent about the payments,
it says $17 for the areas under 70 sq.m or 750 sq.ft, for the bigger areas the price is up. I'm not quite sure is it a bug there, but I turned off the payment form for now. And I already did refund the guys who messaged me about it, so please contact me if you have a payment problem.
I didn't really expect such a curiosity and my initial idea is to make this tool beneficial for real estate agencies and builders and only then try to make it useful for a wide audience :) Thanks for you interest and feedback.
The output will be the same quality as you can find on the landing page, it doesn't matter how blurry the original image, but if the original image is not working, you will be asked to upload a better one or simply refunded.
This feature is marked as "Coming soon" and not ready yet, but the idea is to feed a room screenshot to AI and to generate a realistic design based on this and on a text prompt.