I doubt whether my blog is the biggest or has the most followers (12), but I'm grateful that I've nearly reached 23,000 visitors. I have my books mentioned but they're not the focal point of the blog. I'd say it has helped somewhat with sales but keeping the series visible on Amazon is the going force.
I average around 1200 visitors a day. No idea how many "followers" I have; they're spread out among so many different platforms. Probably not as many as you might think, though.
Honestly, I can't say my blog has really helped my sales. Best I can tell most of my visitors come to my blog after they see the books. I suspect, though, that if I did reviews or offered writing tips I'd see more traffic going the other way.
I get quite a few hits on one or two informative posts I've done but only 4 followers, I think. I don't go in for that "you follow mine and I'll follow yours" thing so I don't know how to go about getting them otherwise. However, I've been featured on blogs with 2000+ followers and seen no sales as a result, so I don't read much into it as a selling point unless your readership have joined your blog expressly to read it, rather than have you join theirs in return.
Ha! I have one more than Jamie, unless you count my niece who somehow is up there twice and a girl in Texas who is divorced from a nephew who likely doesn't follow it anymore or a guy who used to work for me that I haven't heard from in three years....okay, Jamie has more.
Accurate statistics can sometimes be depressing. My blogspot blog had over fifty hits one day - the biggest ever - but then the statistics revealed the traffic was solely by spambots from Moldovia. Google fixed the glitch that allowed them through and now it's back to average ten visitors a day. As for the question in the OP, I don't think my blog helps me sell any books; not yet anyway. Most visitors have bought my books already.
I'm sorry to hear you're sick, Lee. I hope you'll get well soon.