[Research] Companies for compiling training data

I need to retrieve data for Machine Learning training using sample data from event sites for training of a web scraper. Are you sure this is what you want to do? A web scraper is typically rule-based (e.g. But to answer your question, Amazon Mechanical Turk is by far the largest platform if you want to access (mostly unskilled) workforce, as long as you can frame your task into a questionnaire (i.e.