No, we do not claim that we can extract any website. Based on your requirements, we would do a quick feasibility check and let you know the results.
From our experience we are able to scrape data from most of the websites - HTML, JSON, Login, Form Submission, Basic Captcha and JS.
Yes, we are capable and so we have long-term clients. Most of the requirments we have today, is to deliver data continoulsy to support their products or algorithms. We have internally built a pipeline and have the Delivery team in place to take care of such requests.
We take care of the Quality as the primary challenge.
After scrapers development we execute sample runs to check the data quality. Once you( client ) agrees we start scraping the data. We have both automation scripts and manual teams to check the data quality frequently.