I can believe that marketing can make mistakes and produce offers that can be taken advantage of. I can believe that they'd get the rollovers wrong, so this is possible.
What I can't believe is that anyone thinks there's a reset time. These games use RNG with a set return - over time, they hit that return, there's no reason for them to do that on a 24 hour cycle, it's maths, they'll hit what they're designed to hit.
What I also can't believe that you're not being cut either - you're providing ID to sign up, eventually, they're going to notice that you're always in profit, and you're a bonus chaser, and they'll cut you.
I used to hang out with people that used fruities. They were convinced they were in profit, so over the course of a week I watched and counted. Reader, they were not in profit (not even counting the pints they drank whilst using said machines). They were still convinced they were though.
Matched betting works, poker can work (or rather, any game against other real people - you can tell this by how the provider makes their profit - if it's a skim of the pot, they don't care, and you can win as much as you like) - slots are pure maths, and the only possible way is if the bonus schemes are mathematically screwed up.