I've had ideas wither away because they lacked access to the data sources required to drive their purpose. It's frustrating at times, even more so when you know the datasets exist.
PageScraping might work, but I do wonder how complex that might get. It's one thing to scrape a product catalog for a vendor, and another to parse independent websites for possibilities of data.
A couple alternative approaches:
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.