From my early observations this was a Christian ministry . Made up of many different backgrounds.
The problem is the word choice. Christian ministry can mean a lot of different things especially if it's made up of many different backgrounds. It could be that they all agree on a certain doctrine (polygany) but individually would still keep their personal sects and beliefs and are just ministering to help promote understanding of the one doctrine (like polygany, baptism, etc.) That is what I understood the site to be from what I could find here.
After looking up the facebook group that I didn't know existed, and after being here a while it sounds more like what you considered this site to be. Which is that a group of christians breaking off from their own sects in a way, agree on a large segment of doctrine (not just one or two principles, or one doctrine. It would be a list) and consider that to be truth and minister that to others. But in order to not cause confusion they should define it clearly, and define what beliefs they consider to make a person non-christian which rather than on the site occurs in conversations after one joins the site.
In my opinion the description on the facebook group is more clear.
Now I know I'm sounding sharp but I have felt perplexed about this subject for a while now. Like I can tell that as an LDS person, I am welcomed here in a sense, but it's like when I moved NC or Idaho after growing up in the city. Religiously and culturally I understand things very differently. There are a lot things I don't know or understand but am expected to already.
We may use the same terms but they have different meanings.
And I know it's not just me who would be confused or view things differently because I have lived in three different countries, moved over 18 times, and there have only been two places where I have lived that there would be debates over what the word christian meant.