What does “astro-turfing” mean, you might ask? Here is the definition given for it at Wikipedia:

Astroturfing is a word in English describing formal political, advertising, or public relations campaigns seeking to create the impression of being spontaneous “grassroots” behavior, hence the reference to the artificial grass, AstroTurf. The goal of such a campaign is to disguise the efforts of a political or commercial entity as an independent public reaction to some political entity—a politician, political group, product, service or event. …Astroturfing may be undertaken by an individual pushing a personal agenda or highly organized professional groups with financial backing from large corporations, non-profits, or activist organizations. Very often [...]