It's a Trap
and it is designed to catch gullible idiots with money.
It is brilliant though, rather than just catching and then releasing the customer, it alerts Rentokil to many more milking opportunities over time such as
IoT Wasp/Flying insect killer (internet insectocutor),
IoT Crawling insect killer,
IoT Dryrot detector,
IoT Wetrot detector,
IoT Boring beetle detector
Rentokil should be able to take at least £10K per mug punter before their relatives put a stop to it.