ClickBank Affiliates don't need more than one account to promote more than one product. You can promote several products from one nickname account.
However, if you want to create individual account nicknames to link to your ClickBank primary account based on your promotional content, niche, and items your promoting, you can do that. Payments are issued from account nicknames, however, the primary account has combined analytics.
Additional Resources & Related Articles
- KNOWLEDGE BASE: How do ClickBank accounts work?
- KNOWLEDGE BASE: How do I link multiple ClickBank accounts?