Everything has its time. Signature campaigns aren't the only thing that end abruptly. Working in a bank is seen as a "real" job but we get bankers who get laid off every year. It's the same way it cuts across every other strata of employment. . So, we just take life as it comes.
Just because everything has an end that doesn't mean you won't move on with life. That there are accident on the road doesn't mean you won't take the road (enter cars) when travelling either. Everything has an end but you just have to keep moving until the very end. That's to say if you see a better future with something, you move over to it but that should be something with some actual purpose and not things like signature campaign than can easily end.
The side hustle is quite different and can be utilized on different platforms. For example if you're a coder, even though you current job gets terminated you can easily get another that actually pays well unlike the physical johs. Take designers on the forum as an example, their service get hired frequently and they aren't restricted as it's with physical johs.
