The reason I trust (to the extend I trust anything on this planet) Tarsnap is that Colin Percival (the creator) is a cryptographer and the FreeBSD security officer. Leading to me have a higher confidence in him than most of the other "secure" backup services I have seen.
Yeah that's what I mean - it looks more trustworthy than something over-designed with 5 carefully-crafted price plans. Think I'll give it a shot soon. Thanks!