(1) What are the use cases you envision? I can see the value for a really large marketplace in having a ton of pricing data, or the value to a hedge fund etc in having raw data to analyze macro trends... what is the use case for someone paying $200/month for the developer tier? (If I'm a retailer myself I probably only need data on my direct competitors, unless there's something cool you're imagining that I've failed to see.)

(2) You've got some logos on the store splash that don't show up in store search (eg Nike). Is that a data error or a coding error?

(3) You should probably think about how you scrape and categorize marketplace data... the Walmart tab has a lot of products that are clearly third-party sellers transacting via walmart.com, which pollutes quite a bit of the data value if I primarily want to know what a big retailer is doing on products where they actually set the prices.

(4) Have you looked at grocery data? Have wished someone would build a grocery prices API for like a decade now... lots of cool consumer and hedge-fund monetization opportunities if you can show the price of strawberries in every store across the US (and graph the trendlines over time).