The phrase "are influential because of" is correct and usable in written English.
You can use it to explain the reasons behind someone's influence or impact in a particular context.
Example: "The researchers are influential because of their groundbreaking studies in climate change."
Alternatives: "are impactful due to" or "have influence owing to".
While ISG's governance principles do not have the force of statute, regulation or listing standards, they may be influential because of the amount invested by ISG members.
If you, like me have been raised with the notion that celebrities, sports stars and politicians were influential because of what they do and not who they are – we're on the same page.
Indeed we should expect a non-linear relationship if membrane fatty acid composition is influential because of the chain-reaction positive-feedback effects of lipid peroxidation [ 9].
It is important not to exaggerate this trend: most bloggers are influential because their relatively small number of readers include members of the mainstream media and the political parties, while spoof campaigns are still reliant on official material.
Columnists like [Richard] Littlejohn, [Trevor ] Kavanaghand [Melanie] Phillips are influential because they go with the grain of their owners, and their owners - especially Rupert Murdoch - are powerful'.
Managers of health services at the district level and service providers in public health facilities were reported as strongly opposing the abolition of user fees and were influential because the implementation of the policy heavily depended on them; they were opposed because of the potential loss in revenue.
The G30 is influential because it consists of people with experience of putting policies into practice, says Stuart Mackintosh, its director.
On Syria, he said Ukip's opposition to military action was influential because Tory MPs were afraid of losing votes to Ukip.
