I would love to increase my readership as well. I am finding it a bit difficult. I do like coming on to the site and reading other blogs. I have found some great blogs. I normally keep track of the blogs that I join and try to comment on them at least once every other week until I just never hear from them. I love having tons of blogs to read and respond too.
I have ads but I'm signed with an agency and their ads are amazing. Beyond that I also have people contacting me all the time for sponsored posts and I've been able to work with great brands and offer my audience gifts at the same time. For me it's a win win.
It depends on the blogger. If you don't have a lot of traffic than Google ads won't do much for you. Better of to have people pay you to post their ads. But it's your blog and your business to run how you choose- as for me I really enjoy mine.
Lisa Cash Hanson