Tapjoy (formerly Offerpal) has raised a $21 million round of new funding led by Rho Ventures, with D.E. Shaw Ventures, InterWest Partners, and North Bridge Venture Partners participating. Tapjoy plans to use the money to fund growth across emerging application ecosystems domestically and internationally, while also investing in application media licensing and incubation opportunities. As part of the deal, Rho Ventures managing partner Mark Leschly will join Tapjoy’s board of directors. This round brings the company’s total funding to $40 million.