Marklert Turns Amazon Rival-Watching Into a Weekly Brief

Field notes

The service follows a fixed Amazon.co.jp product group of up to 30 items and reports six kinds of movement, including effective price, ranking, review velocity, promotions, new products, and stock. Its sample separates a first-page executive summary from a second page of investigative detail, with figures such as a 28.1% effective-price drop and a 3.2× acceleration in reviews. The sample is explicitly synthetic, while the paid workflow is described as beginning after checkout and email confirmation of the URLs to monitor.