Remember, Chad, email campaigns are permission based marketing, not social media marketing. People subscribe because they want to know what you have to tell them, thus your response rate will be much higher that stats on social media. My last email saw a 65% open rate, the average is below 24%. So, if you say the right things in one email the next one gets opened ... then you can send weekly if you want because your audience is feeding on it. Read the articles in the thread link I provided and I wont repeat it all here.