The article says they had 70k turnover. Take http://www.quora.com/What-are-typical-exit-revenue-multiples... as a ballpark estimate for a multiple. They'd have been very lucky to be paid 7 figures.

5 million is a lot of money. Sometimes I feel like it's 1999 all over again - people spouting 200k salaries and 8 digit 'acquisitions' of < 10 people companies as 'normal'.

Given their size and stage at the time it was likely south of 7 figures or very low 7 figures. Considering their acquirer IPO'd soon after, though, the stock portion probably grew in value significantly. (No inside knowledge of course, but people's perceptions of acquisition windfalls tend to be skewed higher than reality)

At $70k ARR I'd guess no more than $500k. But that's just a guess.