The PR value displayed as a green bar in your browser is not in all cases an indicator of the value which Google and other search engines give to that page. There may well be link juice flowing from the page to the linked destination.
Another reason why a link still may have value is that human visitors may use it to find and visit your site. Directory users are often highly targeted visitors and a directory link could therefore well be worth the money, even if there is not much value in terms of search engine rankings.
PageRank is a poor metric to use for making business decisions. A link is as good as who links to that site.
Compare the backlinks of BOTW to any other directory. Many commercial directories game or purchase their links. They know people are basing their decisions on what the PR meter shows.
There is a group out there that has been building directories for many years and with a history of building up the PR, making a killing off the submissions, then either pulling the plugs on the rented links or having their knees whacked by Google then blowing away. But that's how you get burned when you use PR as a metric, it causes people to lose focus on the more important metrics.
Sad thing is that PR is like Cap and Trade... an artificially created metric which serves only those who provide the metric.
Long and short, it is the number of visitors... and in commerce the number of conversions... that give the true strength of any "page". Snake Oil Sales still exist simply because there are too many born everyday who continue to buy into the schemes.
moonlander... marketing a site, and what you are willing to pay to get in the serps, is beyond the scope of this forum. At best all you can get is "been there done that" replies. And most who have taken that road realized it wasn't the road to results.
There are no magic bullets. There's only hard work, good content, and a REASON for folks to visit. And once you get that visitor on your site you have provided all the reason for them to stay, or click to sales. That's the bottom line. PR means krapolla.
Yahoo Directory has shown no Toolbar PR in the past, and Google has publicly assured that it's there. I feel that the Toolbar doesn't show PR on directory style pages because Google doesn't want directory listings to be bought or sold for that purpose.
In my experience, BOTW listings have helped rankings, if that's what your worry is.
BOTW edits your listings and keeps a well-maintained directory, and also doesn't accept substandard submissions, and those are all important factors to Google with regard to passing PR.