Soap Web service license consumption - Ensemble version 2016.1.1.107.0

Hi All,

    I need some clarification on web service (Soap Service). For each Soap request, system consuming 1 license and it is not releasing until CSP session timeout and extra grace period 5.10 minutes(310 seconds).
    Due to this, at some time license consumption is full.
    If i use with Login credential (i.e password authenticated web service), it consumes one license for 25 connections(request).
    But i need to use it as anonymous user(Unauthenticated).
    Please advice.

Thanks,
Sabarinathan M