кормиться(feed off of something or somebody – to eat something in particular customarily ("of" is usually retained before pronouns) • This creature feeds off fallen fruit; Mosquitoes seem to want to feed off of me!Taras)
заряжаться(feed off (''We get an energetic boost from our passionate fans,'' Islanders captain John Tavares said. ''We want to feed off that.'') VLZ_58)
воспользоваться(She feeds off her boyfriend's naivety to go out with other men. ; Many branches feed off customers' pursuit of wealth to launch more and more new products into the market. Julia Zemly)