Display sentiment analysis on web page?



I have been asked by a company to create a fairly standard sentiment analysis on one of the company’s products and produce an infographic. The company wants to put this on their website to tell visitors how people think about their product. Pretty simple and standard stuff. I used the free search API to collect a set of around 10,000 relevant tweets.

Now the question came up, whether we fulfilled all legal requirements and whether the analysis can be put up on their website legally. Can it? If the answer is no, would it help to officially buy the data from DataSift or GNIP?