When the bull arise, each and every coins available to buy increases in price. That's why there are many people launching a huge number of tokens everyday. And with such money in stake they'd want to do a lot of advertising as advertising would easily payoff and yield more profit. And in that case, each and every of the tokens would be willing to conduct a bounty. During the sideways market, theirs no certainty that a token won't go below the ICO price. Most tokens even fail to reach their hardcap which would make the bounty expenses useless.