Are free publishing services, such as Globe Edit, worthwhile? A free book publisher, Globe Edit, contacted me.

They offered to consider creating a book from my MSc thesis. They said that I wouldn’t have to pay for anything. After reading their website, it appears that they are trying to contact many if not all thesis writers (and other writers, too).

They want me to transfer exclusive rights to publishing my thesis as a book.

Here is their website, if you want to read the details: Globe Edit.

Are free publishers like this usually worthwhile?  I don’t care about making money; I’m wondering whether this free publishing service is at all prestigious or just a waste of time (i.e., neutral or perhaps negative).
These types of publishers are often called vanity presses and as discussed in this question they have limited value. The press you are referring to, and why I think your question is unique, is:


  They want me to transfer exclusive rights to publishing my thesis, as a book.


That is a terrifying thought. That likely means you would be unable to (re)publish any aspect of your thesis as an article and may not even be able to use images in presentations. Your university and/or funder may also impose restrictions on giving away exclusive rights.