Stamina doesn't discourage people from being online, it encourages people who don't have too much time to play (At least this is how it works on Tibia). I play with Opus and I didn't really heard anyone saying they quit because of bots, even though I've seen some players from Vesiv's team using bots to protect them while hunting.
I have personally stopped playing because I couldn't hunt after work, I'd get sneaked and our enemies would simply wait us to go sleep and exp all night, and after a week simply playing better than them couldn't make us win fights, because they were, on average, 30 levels ahead of us.
I have personally stopped playing because I couldn't hunt after work, I'd get sneaked and our enemies would simply wait us to go sleep and exp all night, and after a week simply playing better than them couldn't make us win fights, because they were, on average, 30 levels ahead of us.