Astroturf

falsely made to appear grassroots. This figurative use of astroturf (in capitalized form it is a trademark for artificial turf) is used to describe political efforts, campaigns, or organizations that appear to be funded and run by ordinary people but are in fact backed by powerful groups.

If some big-time marketer fakes a grassroots meme, then you have an astroturf meme.

Sanskrit equivalent

कृत्रिमजनान्दोलनम्