Who checks the data
Ruth Calloway is the editorial persona responsible for the figures in this catalogue and for its methodology and reference pages.
Where a studio publishes no RTP at all, the page says so. An empty field is never filled with a category average dressed up as a fact.
How the data is kept
The catalogue is only as good as the fields behind it, so those fields are reconciled before a page is published.
Reconciled against the studio
Release dates, provider names and mechanics are checked against the studios' own catalogues before a game goes live here.
Missing stays missing
Where a studio publishes no RTP figure at all, the page shows that field as not published rather than estimating it.
Corrections are logged
When a figure changes or turns out wrong, the page is corrected rather than quietly rewritten.
Sources
Studio release catalogues, provider help files and published certification pages.