I understand variable pricing and that fare buckets change all the time - I've flown 5M miles over the last 35 years.
The point I'm complaining about is that the airlines are basically forcing us to check every day for lower fares. I can have my secretary check 3 times a day but this is a complete waste of time and resources for both the airline and customer.
I am not talking about how non-refundable fares go from $200 to $300 to $150 over time by changing availability of fare buckets. That is fine and airlines have been doing that forever.
I am talking about buying a full-fare (F) ticket that one day costs $1200, then costs $1800, then costs $800 and availability and price depend on whether I logon as my GS account or as someone with no status. While this is completely legal and some people will think it is "smart", it is disingenuous to their best customers.