Usually the maximum allocation per person in the bounty is to translation campaign because of the less participants. But the work consumes time and you need to be good at photoshop and of course need to be wrll versed with the language you are translating. There is a tough competition in this segment due to less available slots. So, Google can't help and thus, it's bit tough and time consuming.
Second highest you can get paid in Signature campaign again due to limited number of participants. But since, you can do only one at a time, choose wisely.
Social media campaigns are comparatively easier, but due to juge amount of participants, pay is less. But you can do multiple at a time and hence, and it can be worth it.
The competition is high in translation campaign when the thread opens asap you have to apply and your experience also matters.
Signature campaigns will pay decent money and yes less competition but it only worth full members+
Social media campaigns, if you ask me i will say this is good for everyone those who don't have much time to spend in this forum.
with using your smartphones you can complete this work.