Twitter currently accepts Visa, MasterCard, American Express, Diners Club and JCB credit cards as a payment source.
To add a new credit card to your developer account, log into the developer portal > handle drop down menu > billing > payment methods > add new payment method.
In order to finish setting up your card from the Add new payment method page, follow these instructions:
Billing for Premium Twitter data APIs occurs monthly.
When you upgrade to a higher tier, a prorated credit for your existing tier is applied to your invoice.
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