How much can you earn from the sig campaigns per month? As per my rough estimates, the maximum you can earn is around $400 to $600. Forget about living like a "King", you can't even have a decent standard of living with this much money. Inflation is in double digits and you need at least $2,000 per month after taxes to have a comfortable lifestyle. And I am talking about living comfortably, and not about living like a "King". On the other hand, if you are OK with a very basic hand-to-mouth existence, the I guess $400-600 per month should be enough.
I think this is truly depends on which countries you are talking about. I am from an Asian country and I can relate with OP. Based on the information there, he's talking about the bonus and all the other thing you get for the best poster on the campaign. Pretty much sums up close to $300. If not, let's just take half of it, means $150. So in a month you get $600. In my local currency, that is over 60,000 tk. If you want a decent apartment, you will need 10k from it. And fancy one comes with 20k+
So you are still left with more than 40k. All the other expenses could cost you around 10-15k
You are left with 20k+ every month. So yes, based on from where you are, you can live like a "king". You can have a pretty good savings too. And let me tell you, it is not a very basic hand-to-mouth existence.