Registering domain names or hosting at 1&1 is quite simple, currently, I do not see any error messages, the only issue is having to wait for them to handle manual orders, which may take a few days to get accepted.
Payment requires a Visa/Master card or PayPal account, it is best to sign up for a PayPal account to pay easier, safer.
1&1 Coupon/Deal List for Feb 2020
1. 1and1 Hosting Coupons/Deals– Web Hosting – starting at $1/month – Dedicated Hosting – starting at $50/month – Cloud Hosting – starting at $15/month
2. 1and1 Server/VPS Coupons/Deals– vServer (VPS) – starting at $1/month – Dedicated Server – starting at $70/month
3. 1and1 Domain Coupons/Deals– .COM Domain Name – $1/year – Domain Names – starting at $1/year
4. Coupons/Deals for other services– Website, Blog & eCommerce: Online Starter Kit – $1/month – Office & Online Storage: HiDrive Cloud Storage – starting at $1/month – SSL Certificates – starting at $20/year – Email Marketing Software – starting at $4/month – eCommerce Website Builder – starting at $10/month – Norton™ Security Online – starting at $1.50/month – Professional Email Address – starting at $1/month – Local Business Listing – starting at $10/month – IONOS Cloud – $100 starting credit – Managed Cloud (PaaS) – starting at $10/month – Microsoft® Office 365 – starting at $9/month – Online Accounting – starting at $5/month – Search Engine Optimization Tool – starting at $10/month – Google Ads Management Service – starting at $ 25/month
Note: Each person is only registered one account, absolutely do not register multiple accounts to circumvent the law because 1&1 penalties are very straight: lock the account, domain recovery and not return!