There might be good money in finding email addresses. https://hunter.io/pricing has a model of 25 free searches, then paying. Personally I never had the need to find startups.
Interesting example. This type of information is hard to find so the revenue model definitely makes sense.
For many other types of search, the data collection isn't the hard part, instead the difficulty is to make sense of the unstructured data that isn't very hard to collect. That is why I think paid search is difficult to motivate to an end customer.
For many other types of search, the data collection isn't the hard part, instead the difficulty is to make sense of the unstructured data that isn't very hard to collect. That is why I think paid search is difficult to motivate to an end customer.