If not everything is sold, then burning will be indicated in the technical documentation.
In fact, partial combustion is more profitable than one-time. Burning always increases the value of the token. Therefore, the approach is quite normal and expected.
If sales are bad, this is a way to increase the value of the token and attract new people.
I somehow did not think that every burning will bring the value of the token. In general, everything is not as bad as it seemed at first glance.
How are tokens generated, can you tell?