Online curricular marketplaces such as TeachersPayTeachers.com (TPT) are challenging conventional notions of curriculum, the professionalization of educators, and the exchange of capital in P-12 education. In this research note, we explore these issues by presenting an accounting of: (a) the size and scope of TPT, (b) the number of TPT resources being downloaded, and (c) the financial transactions associated with TPT educator-storefronts. Findings indicated that TPT hosted 4,018,173 classroom resources from 208,748 educator-sellers with 1.5 billion all-time downloads and $3.9 billion in total sales. 69% of all TPT downloads were of free materials. However, an overwhelming 81% of total TPT sales were attributed to the top 1% of educator-sellers (n = 1,524). TPT’s massive scope suggests it has introduced an important disruption in P-12 curriculum, with implications for the professionalization of educators. Furthermore, TPT’s unequal distribution of wealth across educator-sellers suggests disparities in the extent to which individual sellers are part of this disruption.