Originally Posted by mec72

... and the Collecting Avios website further says:

Whenever and wherever you fly, you can earn Avios — with British Airways, our oneworld® alliance partners and our other airline partners. You can earn Tier Points too, on British Airways and oneworld flights.

Almost all flights are eligible. The only flights you do not earn Avios or Tier Points on are reward flights and agency and industry discounted fares.

The amount you collect depends on which airline you fly, how far you fly, the cabin you fly in, the type of ticket you hold and your Executive Club tier. The easiest way to work it out is to use our flight calculator.

My points is, why should a pax be penalized for doing what BA tells us to do, i.e. using the Avios calculator?