TY JOUR TI Media Product in a Dual Media Market: Media Marketing Interpretation and Distinction of Exchange Products in the Attention Economy KW media product KW media product KW media marketing KW attention economy KW media market KW media communications KW audience KW product KW service JO Virtual Communication and Social Networks AU Vaganov, M.Y. AU Emer, Y.A. PY 2026 IS 5 PB Kemerovo State University