This is interesting because I believe the two major supermarkets in Australia can create a duopoly in anti-competitive pricing by just employing price analysis AI algorithms on each side and the algorithms will likely end up cooperating to maximise profit. This can probably be done legally through publicly obtained prices and illegally by sharing supply cost or profit per product data. The result is likely to be similar. Two trained AIs will maximise profit in weird ways using (super)multidimensional regression analysis (which is all AI is), and the consumer will pay for maximised profits to ostensible competitors. If the pricing data can be obtained like this, not much more is needed to implement a duopoly-focused pair of machine learning implementations.