Is there any technical limit for scalability by lowest bandwidth rate limit or any curve x = number of nodes, y = minimal bandwidth limit?
What settings are optimal for huge amount of small middle relays?
Not that there's a technical bandwidth limit but it's probably not gonna be helpful for the network if you run a relay with less than 100KB/s bandwidth. For that it simply slows the network down. You can add as many relay as you want, as long as you configure the MyFamily
correctly.
If you have less than 100KB/s bandwidth, you may consider running a bridge relay. (there's no need to set MyFamily
for bridges)