You can look at it that way but if the consumers believe that 1 BTC in 2021 is worth more than 1 BTC in 2020, they're probably not as likely to pay the same amount.
Just because your operating service doesn't discriminate between USD amounts, it doesn't mean that your consumers do the same.
Not only that, but we also need to take into consideration the important factor that as bitcoin grows in price, so does Bitcointalk's traffic, and most probably so does ChipMixer's traffic(and earnings). So I guess we can probably make the assumption that it sort of all balances out in the end?