I am really interested in testing the weighted feature of the keyword research explorer, but would rather make one payment rather than a monthly one. Is there any way to get let's say a lifetime pro subscription? If so how much does this cost and where could I buy it? Or alternatively, is there a way to get a second free trial; I used the /freetrial link over a year ago, along with the Twitter trial things too but I'd love to know if there's a way to get another trial to decide on whether I would be committed to purchasing a paid tier.