If you want Usenet access, but don’t want to create an account or subscription, here are some Usenet providers that can help you:
Usenet.Farm (Only Offers Anonymous Usenet Accounts)
Usenet.Farm is an independent Usenet service provider based in the Netherlands. This provider only offers anonymous accounts. For registration, a non-disposable email address is required, and you can pay in Bitcoin if you wish.
Usenet.Farm offers account sharing, which means you can use your login credentials on multiple computers. They also offer a trial where you can download 10 GB, and there is no automatic payment if you forget to cancel the trial. For more information see the FAQ page.
Usenet.Farm currently has servers in Europe only. Download volume is limited to 3TB — once this limit is reached your speed is reduced to 8 Mbit/s.
Eweka (No credit card required)
Eweka is a reliable Dutch Usenet provider that does not require an account for service. Instead, a pre-paid system is used.
Eweka allows you to pre-pay for access without a subscription. Here is an explanation from the company:
This means that you purchase days of access to your account in advance. Purchasing days of access can be done using a number of different payment methods shown below. Most of our payment methods are processed immediately. This means you can start using your account only minutes after your payment.
Whenever you do a payment while still having days of access on your account, the payment will be added to it. Payments will never overlap. For example: You have 5 days of access left on your account when you make another payment for 30 days. After the payment has been processed you will have 35 days of access on your account.
Payment methods include Paypal, Credit Cards, Bank Transfers, iDeal, Mistercash, SMS, and Giropay.
No credit card is required for the 7-day free trial — you just need to provide an email address, and I discovered that they allow disposable email addresses