Actually, no if you read the material the 0.24 only applies to converting / applying crdits for INK. Otherwise, current market value is to be used for pricing listings. This seems to be a common misconceptions amongst members.
You may want to refer to: https://help.listia.com/hc/en-us/articles/360000473552-How-much-is-1-XNK-worth-
Converting Credits to Ink
During the transition from credits to Ink, Listia will allow members to apply their remaining credit balances toward listings (including listings priced in Ink) and optionally directly convert their non-purchased credits into their Ink balance. In both of these cases, Listia will value credits as follows:
Listia will fix the value of credits at 27,500 credits = $1 Listia will use the initial token sale price of Ink and fix its value at 1 XNK = $0.14 Therefore, Listia will allow members to: Apply credits toward Ink listings at a rate of 3,850 credits = 1 XNK Convert non-purchased credits for Ink at a rate of 3,850 credits = 1 XNK
Note that the locking of 1 XNK as $0.14 happens only when converting/applying credits toward Ink. By contrast, for other features such as reloading your Store Credit balance or paying for a listing priced in Ink with a credit/debit card, we will use the market price for Ink. Market-Based Pricing
Similar to other cryptocurrencies like Bitcoin or Ether, the value of Ink will eventually be market-based. Many cryptocurrencies are traded on exchanges, and can be bought and sold using USD or even other cryptocurrencies.
This means that at any point in time, the price of 1 XNK is based on what the current going price is on any exchanges that trade it.
I personally refer to: https://coinmarketcap.com/currencies/ink-protocol/ to check the market rate which at this writing is: $0.037460 USD