As a consumer cash shops are a little tricky. Say SE just came out with the standard package you get 3 goodies with that free. I bet ppl would start asking to customize their wedding or giving gifts to those who attend or a special mount for the wedding. Is it simply we as consumers did not get the option to voice our opinion on what we should or should not pay for I'm not sure but I can promise you threads would pop up about extra wedding stuffs ie vial of fantasia. The only other MMO I have played was FFXI and a wedding cost 1 million Gil or more. Gil is not easy to come by for all people so that could have been a deal breaker also. SE knows if ppl are using the cash shop and how much they are making on each item if something isn't making money they will remove those items or atleast won't make variations of those items ie WoW mentioned in earlier post.

P.S. What P2P MMOs offer a free wedding with sub no additional in game transactions? Just curious.