 PadMapper collected data from Craigslist and offered a map of the ads.3Taps, a data scraping and hosting company, was also collecting data from Craigslist as part of a larger effort to gather public datasets.On 22 June 2012, Craigslist sent a cease-and-desist letter to PadMapper, requesting that PadMapper stop scraping Craigslist's real estate listings.