> pulled the plug
Kill cords are a thing (on powerboats, particularly) and the original metaphor is fine.
> > For years, Lidl is expanding operations.
> For years, Lidl has expanded operations.
'For years, Lidl has been expanding operations'. Past continuous tense is better if the expansion's still going on.
> > high-turnover countries
> high-volume or high-revenue
High-turnover is completely correct, at least in British English.