My server, never have incoming connections. Ever.
I assist friend to set up a relay, and from the moment it was turned on it have some incoming connections. Not many, but some. And now, three days later, with similar consensus to mine, it have thousands of incoming:
My server has had much much higher consensus a week ago (I had to turn it down to conserve bandwidth) and even then when it had stable flag and consensus weight ~8000 and was getting 8MiB/s traffic, it had zero incoming connections and still none.
I can start a brand new relay on other VPSs I own (I cannot run the relays there permanently because of restrictions), but when I test them there is almost immediate incoming connections. This is after 30 seconds:
There is clearly a fault somewhere on my sTORMUR relay.