Yes, they do have some nice landing pages but I'm not sure about the links to other domains.
I work with a lot of very low traffic/high click value domains, this means that just a click or 2 per year can make a domain enough funds for reregistration. If those clicks are coming via another one of my sites and not from 'natural' sources then I could be valuing a domain higher than it is actualy worth.
It also makes it difficult to buy domains with these linked landing pages because you don't know if the stats you've been shown are natural or if they will drop off as soon as you buy it due to a link from a high traffic landing page being removed.