An "account bonus" is a reward or extra benefit that you get when you use or open a certain bank account or credit card. It could be in the form of extra money, points, or perks like waived fees or higher interest rates. Full definition
Cards that demand a higher credit score to qualify typically offer more generous new account bonuses, more opportunities to earn rewards and additional built - in perks. (mybanktracker.com)
This will be my third checking account bonus with them since 2016. (doctorofcredit.com)