Using the trap gives a 25% experience boost with successful catches and gives 50% of the normal catching experience for failed catches. This stacks with bonus experience and other modifiers, along with the enhanced yaktwee stick providing its usual 5% experience boost. Use of the trap adds a 10% chance of catching prey, and it stays up for 50% longer.
The traps disappear once triggered, whether or not a creature is caught. Experience is granted in either case, but it is significantly higher if a creature is caught. No drops are obtained from the creatures caught. You can obtain strange rocks from using these traps.
On 30 November 2015 the protean traps received an auto-deploy option. Using it causes the player to automatically deploy the maximum number of traps after which used traps are automatically checked and redeployed until 60 traps are deployed. Moving or running out of traps also stops the auto-deploying.