[anti-censorship-team] Snowflake bridge VPS cost estimates

[David Fifield]

I haven't yet got a lead on finding a stronger server for the Snowflake
bridge.

I did some rough estimates: the cost of a VPS for what we need is about
$250/month, and bandwidth will probably be about another $1000/month.

The minimum hardware specs that would make moving the server worthwhile
is 16 CPUs and 32 GB RAM. To get an idea of the range of pricing:

* Linode 32 GB: $240/month
  https://www.linode.com/pricing/#compute-dedicated
  https://web.archive.org/web/20220207055603/https://www.linode.com/pricing/#compute-dedicated
* Azure F16s v2: $292/month (1 year reserved)
  https://azure.microsoft.com/en-us/pricing/details/virtual-machines/linux/
  https://web.archive.org/web/20220215193358/https://azure.microsoft.com/en-us/pricing/details/virtual-machines/linux/
* Hetzner CCX42: €166/month = $189/month
  https://www.hetzner.com/cloud
  https://web.archive.org/web/20220214145505/https://www.hetzner.com/cloud

The estimate of $1000/month for bandwidth comes from a typical cost of
$0.01/GB = $10/TB, and the fact that during the 6 days the staging
bridge was active, it averaged about 2.9 TB/day sent (and was rising).
https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/issues/40095#note_2774428