I think they mean it was $5 million. The same sentence seems to be talking about both of them, but would be clearer broken into two before "then". I'm interpr

I think they mean it was $5 million. The same sentence seems to be talking about both of them, but would be clearer broken into two before "then". I'm interpreting it as "The first was in the 2000s out of college (~$500k annual); it eventually petered out. Then [the second was] in the 2010s (~$5m annual)."