I found this article in my e-mail this morning, interesting read and information.
https://xs106.infusionsoft.com/app/linkClick/102619/79f7198d77f29a2f/40807215/62937df240f540ea
https://xs106.infusionsoft.com/app/linkClick/102619/79f7198d77f29a2f/40807215/62937df240f540ea