the domain appears to be stripped because they weren't actively using it... To go with the register example, if you registered a similar domain, and then (heaven forbid) el reg shut up shop, and just put up one of those pages domain stealer use (what you need when you need it), and kept renewing the domain, then you'd have a claim, if the domain was used for a more active use (say, domain registrations), then you wouldnt.

Its just like patient trolls really.