The problem with GoDaddy is there are just too many domains. Unless you have a great domain it is unlikely to get noticed.
I wouldn't worry about the 90 days. It's not an issue. The only way people are going to find your domain is going to be by a search.
IMHO the 7 day auction is not stellar, unless again you have a great domain. All the action takes place, if it takes place at all, is in the last couple of hours (max).
You really need to be honest with yourself how great your domains are. So you don't get disappointed.