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
Of the 50 games listed, several studios publish no RTP figure. Those pages show the 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.