To create a more fair distribution of domain names, Handshake names are released each week for the 52 weeks (1 year) after mainnet launch. This ensures that users who learn about Handshake late will still have access to good names. As a result, many of the names will open for bidding at a later date. Importantly, if you’re a Namebase user you can add top-level domains to your watchlist to get notified when they release.