The gold again speaks of wealth (no silverware, let alone clay, for this woman!). To hold a golden cup while she is riding her animal—and it is “full”—speaks of daring, of fun, parties (as opposed to, say, war). This too contributes to awakening a sense of fascination in those who see her, and thus an influence upon them.
4 The woman was arrayed in purple and scarlet, and adorned with gold and jewels and pearls, holding in her hand a golden cup full of abominations and the impurities of her sexual immorality.