I think you know exactly what you're doing :p
Why the max of 46 btw?
I dropped a database on accident yesterday because I assumed that replication was broken (it wasn't). If someone has managed to root my servers I hope they clean stuff up a bit.
>And is there any profit to be made at your current size for your revenue?
Cock.li operates not-for-profit, making it a break-even operation that operates financially separate from cockbox. Cockbox took about $2-3K of investment to get going on rented IP space, total to date I have invested about $9K on server hardware to support up to 180 "slots" (sold GB of memory aka $10MRR) and IP space to support a bit more than that (1x/24 aka 255 IPv4 addresses and a /48 IPv6). Considering ongoing expenses are hardware replacements and colocation costs, profit margins are very high.
I don't really have any idea what I'm doing, but I don't really know how to run a mail server either but I seem to be doing okay with https://cock.li/ (this is where most of my customers are from)
It's currently at about $2K total revenue, and once this transfer of IP space finishes I can properly scale to about $1.8K MRR.