Outbrain's Password Recovery Mail

I forgot my Outbrain password and got this nice recovery email in return:

From: Outbrain CEO <****@outbrain.com>
Hi eishay,

Click on the following link to reset your password:
http://www.outbrain.com/ResetPassword?ticket=****
You will be prompted to choose a new password for your account.

Feel free to drop me a note with any questions you have.

Thanks,
Yaron Galai,
outbrain CEO

First time I notice a "system" email coming from a human that you can actually reply to, nevertheless the CTO of the company. Its an interesting concept, especially since I'm not a paying costumer. Yaron explained their take on it in this tweet:

@eishay Cool!... we have a rule here @Outbrain - all system emails must go out from an email of a human being. I hate all the info@ BS...

I found the approach very appealing, but can it scale? What is the max # of users it can support?
I assume its about the type of uses as well.