Bounty campaigns are the most profitable from the list, even the reward is not as big as rewards in 2016 or 2017 but still it worths.
But many complains said that they are no longer profitable base on the market which is still at the bear trend. You can't compare rewards from those years up to this date. They are completely different and rewards now are almost nothing for most of you.
If you will see on how many projects became successful at the beginning of this year though it's still early to assume. Just take the example of 2018 and see on how many bounty campaigns paid their participants accordingly without any delay.