From what I read they pay low rates but have a certain group of people really wanting to work for them. So an involved process seems good at very cheaply filter

From what I read they pay low rates but have a certain group of people really wanting to work for them. So an involved process seems good at very cheaply filtering out people unlikely to fall into the latter category. I also suspect going through such an involved process that includes praising the job would psychologically make it more likely that you'll take the low pay.