Yeah, if you follow the trail, you'll find a bunch of clearly dummy teams created just to buy other players, and then go defunct.
And the teams selling to these dummy teams (and thus reaping illicit money) are a mix of what appear to be degenerate cheaters (people repeatedly buying guys for 1K and then selling them for many hundreds of thousands of dollars ($222,222 seems to be a favorite, maybe they've found it escapes detection).
Then there were a few teams whose transfer history seemed more normal, and seemed like they were longer term players. Maybe they needed a quick cash infusion. Maybe they felt they got screwed on someone they bought, and wanted to recoup their losses? Whatever. They got reported too.