I still consider this a high fee (5% as most users will mix less than 10 eth, even for security reasons)
After tornado cash, I think many developers might be worried about creating a new ethereum mixer. I understand this might be a reason to charge a high fee compared to bitcoin mixers which are more common
ETH mixing isn't cheap, you have to consider that. Also the team had to spent a lot of time on development and still developing. That's why the interest rate is set like that. They might consider lowering it in the future, like they lowered it from 8% to 5% for regular users.
Some things.
Why don't I have the possibility to check the process status in case I accidentally close the browser tab?
What does mean blue "mixing coins" button on the top? When I click on it, nothing happens.
Currently, the team is focusing on developing things. I don't know why the dev didn't add a possibility to check process status. I will ask them why!
Yes, I tested that myself. The "Mixing coins" button doesn't work. I will inform the team regarding this.
Edit: You can check the status of your application just by refreshing the page. Since RomboMix use "No JS" technology, this can only be done this way. It is highly recommend that you download the letter of guarantee before sending the coins.