Free Squidward painting

Presumably after the RPO (Ready Player One) event removal update (Which featured having to place a red and blue processed wood in the 2 eye holes in the squidward cave). 

 It somehow broke the script, allowing all sorts of items to be used to get the squidward painting. 

 It was a very obscure glitch so it wasn't exploited that hard but the strategy was basically: 

 joining a new server 

 buying 2 basic axes or basic sawmills 

 throwing them into the holes for a free painting