This is from MM2014 help file. End of contents - "If you still have questions," then "Publishing works..."
Publishing works created in MAGIX Music Maker 2014 Premium
What needs to be taken into account when publishing a music or video production?
A distinction is made between "non-commercial use" and "commercial use".
1. What constitutes non-commercial use?
If songs are created with MAGIX Music Maker 2014 Premium or if music is added to private videos, they can be shared with others on social networks (e.g. YouTube, Facebook, Soundcloud, Twitter or personal blogs/websites). The decisive factor in these cases is that no money is made or will be made from the song or video soundtrack.
Examples of non-commercial use:
A user creates a song with Music Maker and uploads it to their SoundCloud page or YouTube channel.
A user produces a song using Music Maker, burns it to CD then sends it to their friends.
2. What constitutes commercial use?
Commercial use refers to videos with soundtracks or songs created using Music Maker for commercial purposes. Commercial use if if sales are made, if revenue is accrued through advertising (e.g. as a YouTube partner or through the process of monetizing) or if contracts are concluded. In this case the necessary licenses must be purchased from Catooh The Online Media Marketplace.
Examples of commercial use:
A user creates a song in MAGIX Music Maker and uploads it to their YouTube channel, which they've enabled for advertising (YouTube Partner Program).
A user produces a song in MAGIX Music Maker and makes it available for purchase from an online download shop (e.g. iTunes, Musicload).
A musician produces a song with MAGIX Music Maker for a CD Compilation, which is sold at concerts.
A user makes a video in which they advertise their company or one of their company's products.
Important: The downloadable styles in Catooh that are licensed for commercial use consist of high quality WAV files. Any "normal" Music Maker content from the installation DVD is in .ogg format for space reasons.
I guess the question would be, what about the instruments included from Magix? Are they royalty free? If not, this should be stated up front before purchasing the software. Sony sells royalty-free media for ACID Studio and Pro. See their media at: http://www.sonycreativesoftware.com/loops