If you want to remove Meiro branding, that's totally understandable! The good news is that it's possible. Once you purchase any paid plan, you'll be able to disable Meiro branding in the Settings.
Here's how you can do it:
Choose the Challenge you want to edit and click on it.
Click on ‘Edit challenge’ in the top right corner.
In the left sidebar, choose ‘Settings’.
Disable the branding.