Yes. I've just re-read ST general provisions and as I understand they can't be responsible if the product we bought are not working as expected...
"SmarterTools makes no representation, warranty, or guaranty as to the reliability, timeliness, quality, suitability, truth, availability, accuracy, or completeness of the Service or any content. SmarterTools does not represent or warrant that the use of the Service will be secure, timely, uninterrupted, or error-free or operate in combination with any other hardware, software, system, or data; the service will meet Your requirements or expectations; "