It looks as fully appalling as any secular romance, doesn’t it?
You may be interested in the conversation that follows this post from 2015.
Once upon a time it was hideously expensive to publish your own books. So there were vanity presses that would do it for you, it you paid them an exorbitant fee. But technology has changed all that, and made self-publishing much easier and less costly.
But for the qualifier “Christian” to alert the reader that the book will be inferior to its secular equivalent–well, we have to work to change that, we really do.