Simply go to below the posts, in the center - there are two join options, one for Google/Blogger and the other for Networked blogs.
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Blogger Opp ~ Darts & Decor Custom Dartboard Giveaway! #Free & #Paid Options Available
Co-Hosts Wanted & Needed ~ $5 for 5 links of your choice (and I mean any you choose other than Google+). You can do Facebook Comments, Blog Comments, Giveaway Entries, Daily Votes, Social Media Follows of your choice, Secret Word Pages ANYTHING! PLUS the 3 FREE links above gives you 8 Links Total! Co-Hosts will also be promoted via graphics and link backs to their site via extra follow pages & Co-Host Pages! (# of extra follow pages depends on # of sign ups so promote, promote, promote!) Co-Hosts are not required to post announcement but it is greatly appreciated!