Well, icopress already offered 17BTC for it, so I'm trying to get the actual price. But here is the thing about a professional developer, they don't need to prepare something for 10 hours, all it takes is to look at how that service is functioning, after all, the important part is the backend functions, because frontend is much easier. I don't know if you are a developer or not, if you are then you are not good at it.
Even if you don't agree with the definition of what a scam constitutes and just think of it as bilking people, it would still be a horrible thing to waste time in this fashion and then just give trolling as your excuse. Its funny as long as you do it an innocuous and short way, but if you are trolling in this instance, then you deserve all the criticism and most likely a ban. So, I hope you are sincere.
Apart from that your view is erroneous, it can very easily take a long amount of time. Remember, that you have linked a very complex web app and have done no expounding at all. If someone is seriously considering taking up the project, they will need to ask themselves a lot of questions to give a price estimate, viability and time frame.
Even though I'm not a coder, but I can easily guess it would take roughly 30-45 days for a team of 4 devs. So also all it takes for such a team is to decide on the time and then put a price on their time. And as we know, everyone has a different price than the others.
Note that, I haven't offered any amount of money to give them freedom so that they could offer what they think they deserve, anyways people are free to ignore this.
Thanks for the warning though, I can't stop shivering. 😂😘
Its better to give a price range. So people know that if your project is worth their time or not.