I find it strange that when I Google "clickbank" I see many sites with clickbank in the URL. Chances are these sites are promoting clickbank, and clickbank did not take the time to send an S&D letter to the website owner. I would guess Clickbank somehow enjoys this traffic, much like I, as a product developer and publisher, enjoys when someone uses my product names in their url, such as productnamescam.com or productnamereview.com, to promote my products.
Depending on what you are going to do with the URL probably really depends on the outcome of the response on the trademark you are potentially infringing upon.
In the case of Nike, where I am not aware of any affiliate program that they offer directly in sale of their merchandise, it would make sense not to try and use squatting or infringement tactics to try and make some sort of financial gain. Pardon my ignorance, but if Nike had an affiliate section on their site, I would harbor a guess that they would be lenient on the types of domains that drive traffic to .... you guessed it.. an end sale. But, they must worry about their brick and mortar merchants, so it more than likely doesn't work this way.
At one point in time I used to sell service manuals for HP Laserjet Printers on ebay. I was a printer / photocopier technician, so I took advantage of the ebay market at the time

. I received an S&D from HP and quit right away.. no further problems.
I would suspect that if you continue with dlickbank.com, and you are using the name to take revenue from the pocket of the copyright holder rather than drive revenue, for example, drive all dlickbank traffic to CJ, then chances are you will have an issue with a lawyer. And when that happens, the first course of action will be a simple cease and desist. From there, you can plan your course.
Otherwise, if you are creating revenue, I don't see why that would be an issue, especially in the case of clickbank. After all.. has anyone ever reported being shut down for cookie stuffing clickbank products? Really, what is the lesser of the two evils... stealing commissions from white hatters or hoping (or should I say hopping HAHAHAH) for a typo?