No, data will not be used against any user of Limeade.
Federal law prohibits the use or the disclosure of BMI and other health information pertaining to any user (called genetic information) to, among other things, change deductibles or other cost-sharing requirements under a health plan or compute a premium or contribution amounts under a health plan in return for activities such as completing the Health Risk Assessment or participating in a wellness program.
Regardless, Limeade does not disclose any information in any identifiable form, but only in an aggregated form that meets certain requirements under federal laws designed to prevent any person from being able to identify a user.
More information about how Limeade is permitted to use and disclose information is available in the Limeade Privacy Policy, available at https://limeade.com/privacy.aspx.