When doing a Wizz/Ryanair dummy booking on Kiwi, there's a clear warning: "Please review the risks of this travel hack." And when you click on the link, there's a detailed explanation of the risks:
What’s the catch?
This isn’t an official itinerary offered by the carriers and they won’t take responsibility for the unofficial connections with self-transfer.
You might need to leave the visa-free zone (the area behind security control, where the gates are) during layover and enter the layover country to recheck your baggage, check in for your next flight, change terminals, or simply because of the airport’s design.
If there are delays or disruptions during travel — like a delayed flight that will cause you to miss your second flight — the carrier who caused the disruption will only help you with flights that are part of their reservation. They won’t help you find a replacement or issue a refund for any other flights you missed. And the same applies to any extra compensation you might be legally entitled to — only the disrupted carrier reservation will be taken into consideration.
To stay covered in situations like this, we recommend adding the Kiwi.com Guarantee. With Kiwi.com Guarantee, we’ll cover another flight to your destination for you or give you a full instant refund.