It seems that at least two 'normal' online store websites that I visit
from time to time have apparently decided to block my IP address which I
am also using for a non-exit Tor relay.  I have had extended discussions
with one of them and they considered unblocking my IP address to be a
risk greater than the lost income (US $160/year revenue) was worth.
They suggested switching to a different IP address, which was like
pulling hens' teeth from my ISP.  To do that, I had to have a technician
visit my house and install a new modem because they do not have a person
who understands tech talk available for ordinary users, and I couldn't
get sufficiently elevated in their support hierarchy.  The supposedly
dynamic IP address that I get from them hardly ever changes, probably
because I am buying U-verse television service from them.
Now, after a couple of months, the "new" IP address is also blocked.

My question is this.  What if it becomes common practice for commercial
entities such as online stores to block all IP addresses that they find
on lists of Tor relays such as <https://www.dan.me.uk/tornodes> or the
official Tor metrics data?
That list is updated every half hour, includes all nodes, and is not
limited to exit nodes.  It currently lists 4438 nodes.  That is a
manageable size for a blacklist, but it could represent tens or hundreds
of thousands of clients.

Wouldn't this eventually either cripple the Tor network or generally
discourage Tor clients that can no longer buy products online from store
XYZ through the Tor network?

David C
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