Some platforms will grant you a significantly higher savings rate if you are prepared to have your interest paid out in the platform's own token. The platform token may well be more volatile than the base currency that you have deposited, so there is a greater chance of both significant increases and significant decreases in the ultimate value of the interest that you have earned. As an additional benefit of being paid in the platform tokens, some platforms then pay a dividend on those tokens thereby further increasing your total earnings. By accepting your interest in the platform token you are in effect indicating your support for the platform and are looking to share in the success of the platform as it grows.