I really don't understand how you protest SaaS layoffs by providing open source alternatives free of charge?

Let's say you successfully create a drop-in equivalent to Salesforce that anyone can use for free, and sales teams decide they like you enough to do so (good luck). It takes off, and Salesforce goes completely under.

They can no longer afford to pay salaries in this hypothetical and everyone is let go. You have done the equivalent of laying off Salesforce's entire workforce. You've replaced a system that pays 15,000 engineer salaries with a system that pays no one and benefits other SaaS companies, no?

I really don't get it.