It could be a side job but honestly signature campaigns pay better than usual jobs where you just end up physically and mentally drained and for what? A minimum pay. I’d rather be doing this in the comfort of my own house than having to go out, spend money for transportation and offer services to receive incomes that do not equate said services.
It depends on the country you’re talking of and their minimum wage. Signature campaigns do give you money but you cant compare it with having an actual job where you put in complete hours dedication. It also depends on the job you’re referring to because there are different job rankings. However, if the said person has no job at all, they can consider signature campaign as a job, but I don’t think it’s wise to depend on it and confidently call it a job.