Different jobs
Plausible (and tools in that family) answer “how many people saw the blog.” Cashline answers “which first touch is attached to ZAR that actually posted.” You can run both. Do not expect a privacy pageview product to grow a Paystack plan table.
What founders in Cape Town usually need
A solo SaaS selling in rand needs revenue per visitor, not bounce rate theatre. If the dashboard is empty, you have not sent events — you do not have a “quiet day” sample baked in.
Cookieless is not the same product
Plausible is cookieless by hashing. Cashline is cookieless by first-party localStorage. That ID can survive more than a day, which is what you want if someone reads the docs on Monday and pays on Thursday. Disclose it in your privacy policy.