The most accurate and popular Payscale - Salary Comparison, Salary Survey, Search Wages' email format is {first}{last} (ex. JohnSmith@hello.payscale.com).
Payscale - Salary Comparison, Salary Survey, Search Wages also uses (ex. JohnS@hello.payscale.com ) and {first}{l} as email structures. Payscale - Salary Comparison, Salary Survey, Search Wages's uses up to 2 different email patterns.