Unfortunately it is not positive, but on the other hand, not that negative.
Just someone saying that if you do a lot of work with Quicksilver, you can get some of the functionality of Container for free.
Well, Container is free, you only pay us $15 if you like it. That might change in the future, but it might not.
Why $15 and not $5, or $10 ? Well, it costs to receive money on the internet. A lot of things to think about, a lot of cost, taxes and so forth.
But we have been using kagi.com for over a year now, we like them a lot, and they take care of everything for us, for some amount of money. Thats why.