Is one who helps fulfill YouTube's requirements (1,0 subscribers and 4,0 watch hours) for money, whether for Muslims or non-Muslims, sinful, keeping in mind that non-Muslims do not care about the content of the ads?

If the intention is to assist in increasing the number of subscribers and viewers for channels that publish beneficial, permissible content for a known fee, then this is permissible. However, if the intention is to deceive website owners into believing that conditions have been met without actual increase, then this is prohibited deception and is not permissible.