If some one is hosting a challenge lobby and u join his game and the map is a checkerboard just leave straight away coz he his scaming u for money

Proof
Join his game then backout and go to private game and u will have the map now staart it it will come up with an error

Now how would u feel if u were in his lobby and u payed him and he started the game everyone will get an error and u are the only one tht lost something money