“…These studies have considered the change in population [12]- [15], number of listings [12]- [15], [17], product prices [14], and volume of sales [14] often collected from scraped data [15] particularly scrapes collected by independent researcher Gwern Branwen [13], [14] though also through manual extraction [12]. For the most part, it has been concluded that the size of the ecosystem recovers after interventions [7], [10]- [14], [22].…”