One way I witnessed is that a host deleted their premise after a bad review and then relisted it.

I sometimes wonder, who are the brave and adventurous people that choose to stay at an airbnb with 0 reviews (in a foreign country).

I have done this in Ukraine when the host had other properties with many positive reviews, and offered a 70% discount for the first stays at the new property with zero reviews. The experience was great, and I even ended up extending my stay.

I did, once I realised that the only reason Airbnb reviews exist is to make amazon reviews look authentic.

I have mentioned elsewhere in the thread that this actually worked out as my best ever stay. OK, I got lucky that time.