There are four steps to working with data. First you have to get it. After that you need to understand it, interpret it, and apply it to your business strategy. Think of the data as bricks—if you want to build something using bricks, you also need to know how to put the bricks together so your structure doesn’t fall down. It’s not simply a matter of buying bricks.
If you want to give your opinion at a surveys website, it’s easy enough to find a site to let you do that—and some will even pay for your opinion. If you want to provide surveys for other people to take, that’s a different matter. Most of the survey sites are created by market research companies for the benefit of their clients.
Big companies with big marketing departments will probably create their own market research surveys. But that can cost big money.