The Snowflake bridges do not expose their plain ORPort (they have `ORPort 127.0.0.1:auto` in torrc), and consequently they have always reported ≈0 <OR> IP addresses in the bridge-ip-transports line of bridge-extra-info descriptors, with virtually all connecting IP addresses being instead attributed to the snowflake transport. (The <OR> count is low but nonzero, which I have rationalized as tor making some small number of internal connections, or something.)
I upgraded one of the two Snowflake bridges from 0.4.7.13 to 0.4.8.6 on 2023-09-24. Since then, the number of <OR> IP addresses has been roughly equal to the number of snowflake IP addresses. The ORPort is still not exposed; these are not external vanilla bridge users. Did something change between these versions that might cause PT connections to be double-counted, once for the transport and once for <OR>?
Here are excerpted bridge-extra-info descriptors from before and after the version upgrade. Note the bridge-ip-transports lines.
``` @type bridge-extra-info 1.3 extra-info crusty5 91DA221A149007D0FD9E5515F5786C3DD07E4BB0 master-key-ed25519 1y9CAtinlbrhDuYBSOBNiCU9Ck1lcY7LErxnzhtxVks published 2023-09-19 10:46:08 transport snowflake bridge-ip-versions v4=13528,v6=1384 bridge-ip-transports <OR>=8,snowflake=14912 ```
``` @type bridge-extra-info 1.3 extra-info crusty5 91DA221A149007D0FD9E5515F5786C3DD07E4BB0 master-key-ed25519 1y9CAtinlbrhDuYBSOBNiCU9Ck1lcY7LErxnzhtxVks published 2023-09-29 17:33:20 transport snowflake bridge-ip-versions v4=2880,v6=336 bridge-ip-transports <OR>=1632,snowflake=1592 ```
Below is a time series for a whole month. The thing to notice is not the overall decrease in users on 2023-09-20; that's due to https://forum.torproject.org/t/problems-with-snowflake-since-2023-09-20-brok.... Rather, the thing to notice is that before 2023-09-24, <OR> ≈ 0; and after, <OR> ≈ snowflake.
date <OR> snowflake 2023-08-30 4 45240 ← running 0.4.7.13 here 2023-08-31 21 193412 2023-09-01 30 195647 2023-09-02 40 200405 2023-09-03 40 201730 2023-09-04 42 195097 2023-09-05 35 190842 2023-09-06 30 189694 2023-09-07 26 191524 2023-09-08 35 195833 2023-09-09 32 196244 2023-09-10 27 146972 2023-09-11 6 55491 2023-09-12 18 182519 2023-09-13 17 173536 2023-09-14 21 161396 2023-09-15 21 166379 2023-09-16 16 174350 2023-09-17 17 165063 2023-09-18 23 164734 2023-09-19 32 164075 2023-09-20 23 121623 2023-09-21 2 25268 2023-09-22 0 4314 2023-09-23 0 746 2023-09-24 239 606 ← upgrade to 0.4.8.6 on this day 2023-09-25 1919 1900 2023-09-26 3533 3470 2023-09-27 11919 11687 2023-09-28 20242 19890 2023-09-29 26583 26100 2023-09-30 25929 25400