Wikitree doesn't decide. Individual members do what needs to be done.
I began 17 months ago, entering my family, then I got access to an unpublished document covering 8 generations beginning about 1650. I've been entering that, and learning how the Wiki tree works. Recently, I've been working on merging dupicate profiles. Wikitree had become a place for ameteur genealogists to store their trees, and its intent is to be one tree. The GEDcoms that had been 'dumped' contained thousands of duplicate entries, many covering the 1600 - 1700 period, when we all are interested in our early families. I've found that sorting out real people from wannabes to be quite a challenge.
Start easy, let it grow on you. I see you've made approximately 1200 entries, this may amount to as many as 300 profiles. its a good start, keep on and eventually you will figure it out.
Lianne (belos) probably would be good to discuss questiones with.