All of this seems like the type of criticism you could level against 90% of social science. Many of the things you criticize them for, are what I would consider transparency, which I would consider good.
Why didn't you just ask? I mean, it literally says it is from http://www.survee.dk/ . The other criticism you offer is generic stuff about online pollsters, which have generally been proven wrong. Read up on the literature comparing MTurk results to college students.