Well, many things...
They may have converted to HTML5 from Flash.
Lmao. I work in WEB for a good 10 years. My breakfast is a bowl of HTML5, CSS3 and a good portion of healthy PHP coding along with it, having my own 15+ managed servers by a team of 2 somewhere in the netherlands. I think i host along the almost 3 grand of websites here.
A game changed due to conversion from Flash (since it's being abandoned bigtime by browsers, but you can still run it) to HTML5 is really nothing. And it does'nt require any of the game math to be changed while your at it. All the calculations eventually takes place onto the server, and not client. Client can only press buttons and that's about it. You dont need to change any of the math for this to port.
I'm sorry but that argument is a bad one. I think my theory is this. A game provider offers a bunch of games. And per game every avg wagering is being tossed in one big pile and random/evenly distributed.
Some games are new and in order to give it that attention about big pays RTP may be moved over from game to game, where one game today is hot and is performing like shit tomorrow. Some games are altered and will never perform as they did before, Its with a reason.
I've seen games being changed where you normally could tap the space to stop the rheels instant, to now sit it out per spin. But the payback it before had was never there again. Another game, Pirates something, which had 2 features and a max bet of up to 50 per spin. They changed it back to a 4 euro per spin max bet since the 2nd feature (with the money bags) got exploited.
The game runs again like complete shit, wasted over 300 spins to never come close to even a 50x bet.
It's always funny that threads like these halfway completely go offtopic. Nobody doing any work or posting otherwise at least some facts and that are not just within the UK. The reason why i got here was proberly due to the authority it has over gambling, but at the end of the day even this website is filled with affiliate marketing as well. Give the peasants bread and water...
Actually, I have been part of a couple of situations... both times had compliance issues. In one, we could work out exactly what people should have won when they didn't, and the casinos reimbursed those players (paid for by my company at the time). The second time we couldn't work it out easily at all, so we made a donation to the value of the what we believed the underpayment was a gambling charity.
So this should, and does, happen.
Lol. I never heard a casino writing me or others like Hey dude, you've bin playing this game and that game, we're sorry but because of a technical malfunction on the base game, we're compensating you as a valued player. We're sorry for any effort. They dont give a shit lol. If the game was bricked they still hide behind their providers. Providers not going to compensate any of you.