5 Mystery Shops

1. Ellis
2. Presto Shopper
3. MarketForce
4. GigSpot
5. Coyle

5 Gaming Sites

1. Free Cash
2. KashKick
3. Branded Games
4. Benjamin App
5. Inbox Dollars

5 Survey Sites

1. Prolific
2. Branded Survey
3. Brox
4. Klink
5. PineCone Research

5 Task Based Sites

1. Toloka
2. Clickworker
3. MTurk
4. Appen
5. TaskVerse