For a relevant time comparison you should subtract the research time, mind. Those accounts were worth about $1K a year to me back then, but the amount of time I spent trying to figure out new "hacks" was no longer worth it once I had a job.
If you already know about it and aren't hanging about on the equivalent of coupon forums, yeah, it takes 1 min, you'd be a fool not to.
As for the time spent researching. These days it basically non-existent. If you google "best rewards credit card 2019" you'll find half a dozen sites all with similar recommendations all telling you basically "Get this one, then in a few months get this one, then get this one, then close them and start over in a year. Don't do anything fancy, just spend enough to cash in the sign-up bonus and then switch to the next."
> The city?
The bank. They were literally giving you money to have a bank account back in… 2008?. I took advantage of the offer at the time, but they’ve been phasing it out.
It's free money even if you don't travel. 80,000 chase points is also worth $800 cash directly. They just boost it %25 if you use it for travel through their portal (I suspect that you don't get the best fares through their portal though, so that boost seems like it might be a wash).
> You could get 10 quid a month from Halifax
The city?
> but being a software developer is better paid
Unless you make $700-$900 (subtracting the $95 annual fee) per minute (the amount of time it takes to sign up) while working, working really isn't better per amount of time spent.