Basically after getting access to the database, you need to register your name directly to the company. The best is to register with as much as company available in the database.
They will notify you whenever there is a survey and whether that is survey is valid for your area.
why woudl they pay you for a online survey, that too a lot of money, when they can have it for 1-2 $ from any number of online sites ( example would be something like cpalead)
maybe they need something very special, for that somone once in a while might get paid like 10-20$ for it, but hundreds of dollars, i dont think so.
moreover, the surveys are so so long that usually even after best of one's abilities one cannot make more than like 10-15$ a day, and that , in my opinion is not worth it.