$50k can be deposited cumulatively within 90 days
"New accounts must be opened within 30 days of registering for the offer.
Additional deposits to the eligible Fidelity account may earn you a higher
mileage award provided such deposits result in the cumulative deposits in
the account being at or above the next eligibility tier (up to a maximum of
25,000 miles). Initial and subsequent deposits must be made within 90 days
of Fidelity account opening."
however, you have to keep entire $50k in your
