Is Tracking Sales Attribution Through MCF accurate?

[McMohan]

I am entering into a contract with a client who is offering us to give a percentage of sales that we drive through SEO. If we used Multi-Channel Funnel (GA) or any of the Attribution models (say Position Based) in GA4, is it likely to report close to actual sales driven by organic traffic? What may happen when Google stops third-party cookies? Thanks!

[not2easy]

Several common browsers are blocking third party cookies by default. Safari does, Firefox too.

(default setting)

Standard
Balanced for protection and performance. Pages will load normally.
Firefox blocks the following:
Social media trackers
Cross-site cookies in all windows
Tracking content in Private Windows
Cryptominers
Fingerprinters
Includes Total Cookie Protection, our most powerful privacy feature ever
Total Cookie Protection contains cookies to the site you’re on, so trackers can’t use them to follow you between sites.

See more: [support.mozilla.org...]

[tangor]

Third party tracking has many obstacles to be useful for more than predicting trends, and rarely THE BOTTOM LINE.

The ability to report ACTUAL SALES accurately is highly unlikely: too many factors beyond your control.