churner
/ˈtʃɜrnər/
noun
- A person or thing that churns, especially a device used for churning butter.
- She was a skilled churner who could make butter in minutes.
- The electric churner made the job much easier than using a hand crank.
- The old butter churner sat on the shelf as a decoration.
- A person who frequently switches between products, services, or accounts to take advantage of promotions or rewards.
- He was a known churner who signed up for free trials and then canceled.
- Some churners make a hobby of collecting sign-up bonuses.
- The credit card company introduced rules to discourage churners from opening accounts just for bonuses.