On YouTube, as long as you don't have monetization enabled on your videos, it's usually okay—the worst that happens is your views get stuck, or you receive a notification saying your channel got a wave of bot traffic. On Reddit, they shadowban your post, so whatever upvotes come in won't be counted, even from real, aged accounts. On Twitter (X), they categorize bot replies in a specific section, label them as possible spam, or hide them entirely