New Relic do this as well. Extremely irritating, made worse by the smug, overly familiar tone of the emails, which were phrased as if I'd shared a frathouse with the copywriter or something.
EDIT: just looked back through them, and that last bit about frathouses was probably overstated. It definitely felt like that at the time I received the messages though.
Funny you mention New Relic because that is the company I had in mind when I read this post.
After unsubscribing/uninstalling New Relic from one of our servers/apps one of the sales guys contacted me via email. I ignored the first email, but he sent two more in 48 hours and I finally decided to let him know that we went for a competitors' service.
In a back and forth of emails, he kept harassing me because he wanted to know which competitor we went for. After telling him, this was his reply:
>Good luck with it. Doesn't look like there's much overlap with what we're doing in the way of far more advanced web app diagnostics and analytics.
That arrogance made me cancel a "Standard" account ($49/month) we had with New Relic on another server. A bit of humility goes a long way, not conceited attitudes.
Same here, I signed up for their Node.js monitoring (saw the logo, then specifically ticked that's what I needed during sign-up), then discovered it's not actually available yet after the fact. Since then it's just been a barrage of emails, "Why haven't you set up your monitoring yet?!". Hmpf.
EDIT: just looked back through them, and that last bit about frathouses was probably overstated. It definitely felt like that at the time I received the messages though.