How to pay for Arweave?

Could you please elaborate on the various methods available for paying for Arweave? Is it possible to use fiat currency for payment? If so, what are the conversion rates and associated fees? Are there any specific payment gateways or platforms that are recommended for making payments? Additionally, are there any cryptocurrencies that are widely accepted as payment for Arweave services? If yes, which ones are they and how do I go about using them for payment? I'm also interested in knowing if there are any discounts or promotions available for paying with certain payment methods. Thank you for your assistance in clarifying these points.