You should read this - https://openobserve.ai/blog/sso-tax
Not all products have other good features to use for price discrimination, so I have some sympathy for vendors here, but I think it often indicates laziness in thinking about what they can use to do the necessary price discrimination.
This should cover all companies with 10 developers.
Edit: People here do get what you're saying - "This is the only way we can force some users to pay". What you're not hearing is "Either don't call out your software as FOSS, or if you do, figure out ways of price discriminating without hurting security for FOSS users."