Not a “scam” in the sense of the word, but really not a way to earn any type of money. If you can find the companies that do the surveys and do them on your own with out sites like this you will make a substantially bigger amount of money. The “scam” is they take 90% (if not more, to be honest probably 99%) of the survey payout for themselves. Its the same for the “offers”, they will take the majority of the offer from the company, and give you a small percentage, And if that was not enough, they also take a percentage of your payout. This should be illegal as it is criminal to do this to people.
In a few cases, InboxDollars directed me to “exclusive offers” instead of straightforward surveys. One required me to give my name, address, phone number and birthdate to earn money and enter a sweepstakes for a Target gift card. Another time, I was prompted to give my email address and choose between Coke and Pepsi in exchange for $1 and a sweepstakes entry. I didn’t want to give my contact information to what appeared to be third-party sites, so I clicked out of these promotions.