ironSource SPAC

BUSINESS MODEL & FINANCIAL OVERVIEW Consistently high dollar-based net expansion rate¹ 136% Q1'19 ironSource has one of the highest reported dollar-based net expansion rates in software 147% Q2'19 IS ironSource 158% Q3'19 149% Q4'19 145% Q1'20 146% Q2:20 150% Q3'20 We calculate our dolar-based net expansion rate for a period by dividing ourent period continuing revenue from a set of customers by prior period revenue from continuing operations of the same s set of customers Prior period revenue is the traing 12-month revenue from continuing operations measured as of such prior period and Curent penod revenue s trang 12-month revenue from continuing operations by the same customers an of the curent period and Our calculation of our dollar-based net expansion rate includes the effect of any customer renes, expansion, contraction and chum, but excludes revenue from new customer 149% Q4'20 176% Q1'21 Confidential 42

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