well it's not a lot of time anyways
one retweet, or one quote retweet or something like that
will take less than one minute and can be done almost on automatic if you're rolling social media
but I do agree there are better ways to make contests excluding bots
There are many events in which these bots can't take part like getting free spins or coupon codes with some wagering requirements.For the normal giveaways also the amount is small and team do it for small promotion to keep up the social media reach so for bots they don't care too much and we can also try as algorithm can pick up any person from the list randomly.