I believe the A1 Assessment is a very short test (10 mins? corrcted the speaking and listening part is ), and if the applicant can speak and understand basic English, there is no need for any course work , or enrolment in classes.
as its a new test, most people are unsure of what it is, who needs to take it and where it can be taken, etc. thou you are providing a service thats needed by some people on here, your not the only one to provide that service but are the only one to post about your service. there is a fine line btw advertising a service that people need and spamming