Its a totally reasonable decision to target an audience, that I might fall outside.

My primary thrust is neither the 'Actuals' copy on the landing page, nor the 'Actuals' explainer video explain the term. (OP has explained it elsewhere on this page, thanks!)

Secondarily, I wonder whether this should be targeted exclusively to accountancy folks (which I'm not) or also Data Science/ Statsy folks (which I am, and who are increasingly helping high tech companies with their financial modeling).

The latter group is definitely a smaller niche, but might have more of an awareness/interest in what Invrea is doing; maybe not, but if I had to guess, I'd say there's a big customer education challenge targeting accountancy folks.

Maybe you could explain or provide a link to the definition? He might know what it is under a different term.

This is a term used in accounting and so on. Firstly, there is a company budget plan, and then each month (or week, or so on), _actuals_ are being incorporated to the plan.

See, here, e.g., under the Noun section: https://en.wiktionary.org/wiki/actual

Usually we call it an observation, and it is exactly OBSERVE command in probabilistic programming languages like Venture/Anglican, but in our plugin we have decided to try business-(accounting-)related terminology.

Thank you.