Hello,

I would to ask if domain mapping is allowed.
Let's say i create "example.bplaced.net", and then i buy the domain mysite.com, am i allowed to use domain mapping so that my visitors see mysite.com instead of example.bplaced.net? Or is it against the rules? I have not seen anything related to this in the terms of service (google translation of german to english, not perfect!)

Thank you in advance

Sure
And u can do that with .htaccess file

The functionality is located in the control panel in the section Domain settings : Adding an external domain. Additionally, you will have to create an A or CNAME record on your dns-server pointing to bplaced.