Yes, Prolific.com is a legitimate platform for participating in paid academic and market research surveys. Established in 2014, Prolific collaborates with universities and institutions worldwide and maintains transparent and ethical payment practices—typically offering at least £6/$8 per hour and allowing cash-outs via PayPal once you reach about $6. User feedback is generally positive: many praise the fair pay, engaging surveys, and straightforward interface 
The Income Informer though several point out that survey availability can vary and the app doesn’t exist (beware of scam apps). Some users report challenges with ID verification or account holds, often citing limited explanations from support