The major labels have been using a broken barometer for some time now, that is to say they have no predictive capabilities of their own, so what they tend to do is look outside to see what's working in terms of popularity so they can capitalize on it, and what they are probably looking at is a large volume of mouse made Toucan Sam beats and assuming that because they are common it's actually a popular style.
Where things get interesting is when a perceptional domino effect takes place and newbies influence other newbies so that they end up making similar sounding music based on the same lack of knowledge thus creating a style, for example back in the day we didn't have Fruity Loops but what we did have was cheap hardware and no idea how to use it, so we would experiment and if something worked we would share it and it would become common practice, like almost nobody actually used the loop functions on their samplers to make loops and this is something that has carried over to this day where what people call a loop is actually a one shot sample triggered to sound like a loop.