I remember the pain it was to write custom scrapers every time (I used to do it with Perl, btw).
They have a custom browser with a nice interface, but the biggest thing are the so called "Connectors": you instruct the system into how to query and parse results and Import.IO will give you an API endpoint for this query, now automatized.
One can, say, create a "connector" which can query Airbnb and parse results, then create another "connector" which queries booking.com. Now it is possible to use the API to make a query for Boa Vista, Roraima (my city) and get the dataset.
I am not affiliated with them in any way, just a very happy old-school scrapper.
Nice walkthrough: http://www.youtube.com/watch?v=_16O10Wx2W4
UPDATE:
Unsurprisingly, import.io was Hacker News stuff in the past: https://news.ycombinator.com/item?id=7582858