Do you have a budget of \\1.99 for testing the service? If so, are you able to head over to the dashboard and make a top-up? \\1.99 will yield you 100 credits, which I believe should be plenty for you to evaluate the service.
In our early days, we offered free trial credits to everyone that asked. It turned out that almost everyone that we gave additional free "evaluation" credits never followed up with a purchase.
On the flip side, serious (paying) customers have never hesitated in making small top-ups for evaluation.
We do not provide trial credits beyond the first 10 credits that are added into your account when you first register an account.