BioLife offers compensation to plasma donors in the US who are over 18. You can donate twice a week and have funds transferred to your debit card after each donation.
To apply to be a donor you will need to have a physical examination and complete a medical questionnaire. If you are accepted you can donate plasma twice a week with at least one day between donations. Your first visit will take about two hours and subsequent visits will take an hour.
The website does not specify how much donors are paid and says you have to talk to your local center to discuss. However, they do mention the payment method which is via a BioLife debit card. Funds are added to your card after each donation and you can withdraw the cash from ATMs, transfer funds to your bank or use it to make purchases.