Well, I am a Micro-ISV (independent software vendor) so right now I do not need any advanced systems. I just use technology instead of employees. Automation was one of my priorities while creating my business. Technical support is the only thing that's not automated, because I always disliked these stupid answer bots that some companies use. I once took a month off, "worked" just like 10 minutes / day and... it was my best month (financially).
I still don't use these email marketing bots so I can't really help you with that. However, I plan to try some new marketing techniques and this will be definitely one of them.
My business is still small, but it's growing. In a year or two I will probably get some
peopleware 