At this point in time, Google charges Android developers a cool $25 before they are able to sell their apps via the Google Play marketplace, and it seems that this system has been compromised in a sense, abused rather, as a bunch of cybercriminals are willing to pay up to $100 for a legit Google Play account. These are then used to offer malware, as it has been masked as legitimate apps, prior to the Trojanized packages being put for sale to unknowing folks. If you ever get such an offer, it would bode everyone well to refuse it, and inform the relevant authorities so that such activities can be clamped down.