There are no limits to earning cash back - deposit as frequently as you want of any amount, and you'll receive up to 1.0% on all deposit.
Just to clarify how up to 1% cash back incentive works:
Each month, earn a cash back incentive on deposits — up to 1% annually. You automatically earn a 0.5% annual incentive on your deposits at Wise. You can qualify to earn an additional 0.1% annually for every $1,000 spent monthly on Wise Cards, up to a maximum of 0.5% annually (for spend of $5000 or more each month). You are automatically qualified for the bonus incentive based on your monthly card spend and your account will be credited each month.