it was reasonably well known about online 15 years ago tbh...
I'm still not sure exactly what you're expecting here - there are lots of ways in which people make money in various fields, it is hardly as though match betting is going to earn you a fortune...
Depends if you think several thousand pounds pocket money is worth it or not. Given its on top of my income, I certainly do. I'd heard about matched betting years ago but the phrase 'too good to be true' stopped me really looking at it. Clearly in this case, that phrase simply doesn't work - I admit it may be a very rare example.
Mining is the same really. It is risk free at the hobby level. It doesn't require any upfront investment if you use equipment you already have, and if you have a use for the waste heat ie heating your house then there is actually no outlay at all. So why didn't I do this 5 years ago? I don't know.
Current account switching is so easy, most simple £800 I ever made. And again, risk free pocket money.
So I guess I'm just asking whether there is anything else I can get into, and hoping I'm not many years too late this time. Not looking to be a pioneer.
And if there is nothing at this time, then what circles do I need to get myself into to pick up on these things as they arise?