Between posts about conspiracy theories and right-wing grievances was an unusual advertisement: a photo of former President Donald J. Trump holding a $1,000 bill made of gold, which he was apparently offering free to supporters.But there were a few catches: The bill was not free, it was not made of gold, and it was not offered by Mr. Trump.The ad appeared on Truth Social, the right-wing social network started by Mr. Trump in late 2021, one of many pitches from hucksters and fringe marketers dominating the ads on the site.Ads from major brands are nonexistent on the site. Instead, the ads on Truth Social are for alternative medicine, diet pills, gun accessories and Trump-themed trinkets, according to an analysis of hundreds of ads on the socia …
