"I don't know if YaSexHoo is cybersquatting ..... isn't that registering a domain for the sole purpose of blackmail?"
There is no single definition of "cybersquatting". The UDRP defines "abusive registration" as:
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(1) your domain name is identical or confusingly similar to a trademark or service mark in which the complainant has rights; and
(2) you have no rights or legitimate interests in respect of the domain name; and
(3) your domain name has been registered and is being used in bad faith.
where several examples of "bad faith" are:
(i) circumstances indicating that you have registered or you have acquired the domain name primarily for the purpose of selling, renting, or otherwise transferring the domain name registration to the complainant who is the owner of the trademark or service mark or to a competitor of that complainant, for valuable consideration in excess of your documented out-of-pocket costs directly related to the domain name; or
(ii) you have registered the domain name in order to prevent the owner of the trademark or service mark from reflecting the mark in a corresponding domain name, provided that you have engaged in a pattern of such conduct; or
(iii) you have registered the domain name primarily for the purpose of disrupting the business of a competitor; or
(iv) by using the domain name, you have intentionally attempted to attract, for commercial gain, Internet users to your web site or other on-line location, by creating a likelihood of confusion with the complainant's mark as to the source, sponsorship, affiliation, or endorsement of your web site or location or of a product or service on your web site or location.
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One would imagine that Yahoo is claiming that circumstance (iv) is present, since the web site in question is a search service and copies the look and feel of aspects of the Yahoo web site. While condition (2) on legitimate rights includes a bona fide offering of goods or services using the domain name, among other things, panels have consistently found that an infringing use does not qualify as a "bona fide" use. Here, it is clear that the registrant is familiar with Yahoo! and deliberately used a variation of their name (given the similarity of the logo, etc.).
The "difference" between this and yowho.com is that Yahoo! is complaining about this one. They are entitled to set their own enforcement priorities, and I would not imagine this dispute coming out differently from, for example, yahomo.com.
"Someone else is doing the same thing" is not a defense.
As far as the administrative fee assessed by GoDaddy, it is in their domain name registration contract. If you have a problem with them doing that, then don't register domain names with GoDaddy. The merits of the complaint are irrelevant to their ability to charge an administrative fee. It takes staff time to deal with UDRP procedure well beyond the couple of dollars they make over the wholesale cost of registering a domain name. I'm surprised that more registrars haven't done something like this to recover the cost of dealing with UDRP proceedings.