니까 따르다

since X, follow suit or pour

-(으)니까 gives the reason, and 따르다 has two unrelated meanings that both appear here. Following: 저러니까 따라하고 'they copy because the influencers do it', 리드할 테니까 따라만 오세요 'I'll lead, just follow', 미국 올리니까 따라 올렸지 'they raised theirs because America did'. Pouring a drink: 맹물 좋아하시니까 따라주지 마, 'he likes plain water, so don't pour him any'.