30 days is less 6 months !! correct $15 only issued if changed domain within less then 6 months so again can't see why change domain after x months ! when domain normal comes with 1 year price tag ? so again don't see where problem is reduces the amount people change the domain to license to reduce people misusing the license system.
I have got to ask the question did you read the web site BEFORE buying Invision Power Software ? Taken direct on the site so clear show you need continue with payments IF you like accress to downloads or additional services. How more clear can that be ! really its like you moaning over item that made clear and simple to understand or IF you was so unsure they provide support BEFORE you buy using the Pre-Sales section on the forum or email the sales time again on the same page when click buy !.