It's at the mercy of OpenAI to throttle or disable the underlying access.
It's from an unclear team using crummy mealy-mouther likely-ChatGPT-originated copy. So why would anyone trust it?
It casts shade against OpenAI, claiming – contra OpenAI's own assurances about retention – that "ChatGPT may store data related to your queries and responses". But, it only offers the same non-verifiable assurances itself – with even less reputation, or opportunity to hold accountable for violations, than with OpenAI.
Overall, a service like this seems extra-likely to have been offered by sketchy operators, & mostly of unique use to people who want briefly get-away-with-something with regard to OpenAI's preferences.
There may be a place for such a service, but I wouldn't trust it or expect it to be useful for very long.