I never understood this. I always thought that you'd rather buy from someone who is likely to go out of their way to serve your needs than to buy from someone who simply doesn't care. I know that all other things being equal (I mean, assuming I think both companies can actually deliver, at a similar price point, and that one company isn't going to vanish while I still need them.) that's certainly how
I feel, when I buy expensive things.
But then, I've pretty much miserably failed to sell any product (other than my time) that was worth, you know, real money per-customer, so this is likely one of those areas where I'm just weird, and another reason why using myself as a model for generalizing human behavior is a bad idea.
Personally, I focus on selling a whole lot of little things, mostly because I've utterly failed to sell big things, and I've met some success selling lots of little things. Obviously, $10/month is not going to make or break me... and if I spend a lot of time on any one sale, obviously, I'm not going to end up with an acceptable hourly rate, especially as I have some significant marginal costs that come out of that $10 before it can be spent on my salary. But I think it's important, to some extent, to still treat people like customers; yeah, the accountant won't even notice if that customer quits next month. But if more people quit than sign up? or if that customer quits and then loudly complains in public about my bad service?
The customer isn't always right, but dealing with customers you don't want as customers is a delicate art. I'm certain that if I took an insulting attitude towards the customers I didn't want, it'd end badly for me rather quickly. So it seems to me like this issue is... complex. You want to appear to care, but you don't want to appear desperate, and the line between those two, much like the line between confidence and arrogance, can be pretty blurry (at least to someone as socially unskilled as myself.)