It sounds like our support was trying to help you troubleshoot a login issue — to say that we “require you to disable VPN” to login so that we can push our own VPN product on you is absolutely false and actually kind of absurd if you know anything about our business.
No, please don't twist my words. Namecheap's support rep told me that Namecheap is rejecting logins from customers using the third-party VPN, and that Namecheap has no plans to allow customers using the third-party VPN to log in. It is relevant to point out that Namecheap is refusing service to customers who use one of Namecheap's competitors. That's a conflict of interest, whether you admit to it or not.