I started a mailing list for my site and use it monthly.
My only source of income is adverts and with a CPM of about $2 now I'm close to outgrowing mail chimp free as getting close to 2000 members. It really doesn't seem worth paying $30 a month for something that at the moment is bringing around 300 clicks to my site a month. So for my list I'm making around 66c.
Am I doing something wrong with my strategy or is it clearly not worth it?