One fairly credible source is
https://electrek.co/2020/06/23/sondors-rockstar-cruiser-lx-bafang-ultra-electric-bike/
Whatever your opinion of Sondors and his eponymous company and its peculiar history, there is no denying that he’s sold a lot of bikes. Thus he has economy of scale component pricing power only a few with the same direct to consumer Chinese factory business model have achieved.
It also doesn’t hurt that either he himself or someone on his team has a flair for industrial design with all his models, including the new mid drives, having a uniquely recognizable look to them. Apparently several people own several, buying as the models evolve, so their families can all ride together.
I have an LX “aventador” (apparently named after the mid engine'd Lamborghini) on order for its belt drive ready R & M Nevo clone frame and gigantic fat tires for riding through Minnesota snow drifts.