Sorry mate but i cannot access their telegram group, i remember i was there but now i am no longer in that group, i even searched their group but it says it does not exist.

What kind of company totally locks out anyone who was not in the Telegram during ICO?
A very dubious one is the answer.
They do not give a shit about the current investors as they are now blocking any potential new investors, not that many would invest now that they have seen the size of the payouts.

Well I'm the so-called "idiot" with 20,000 ROCK2 tokens. The first payout I got was 0.114 Rock2Pay which can be converted to ETH in 1:1 ratio.
So for your 20,000 ROCK2 tokens which at 50% Discount on ICO price cost you 10 Grand you received......wait for it...
...at whopping $27 dollars....at most.
Do you feel proud? LOL $81.00 per month.
So when it is running at full capacity, I'd expect 0.114x4x10=about 4.5 ETH/month. Given the current ETH price @$233, I'll be getting over 1000/month in payout. It's about 120% return annually when running at full capacity. I don't see this as a scam or bad investment, just takes some time.
Your figures are wrong and have not taken into account difficulty and price movements.
At best you will receive $100 per month in 2 or 3 months time. So in total your 10K will have given you around $400-$500 for a "cough" lifetime investment.
When do you expect to make your money back, some time in 2023?
Difficulty will be through the roof next year leading up to the halving and you are better off selling up and buying 1.5 BTC now than trusting these liars with your hard earned money.
They have lied about many things and continue to do so. Want me to list some of their lies? What the heck, just for you oh wise investor.
1. They lied about the calculations on the website
2. They lied about being paid in ETH and instead you are getting paid in ROCK2PAY a contract which THEY control, so they can cut off payments anytime they like, and just disappear from being online and your money is gone.....well it already is now anyway.
3. They lied about opening the Telegram to new investors.
4. They lied about the Cave itself, now they are using some dusty dirty shithole of a warehouse and have now gone against the whole concept of the "Cave Mining". (BTW if you question this in the Telegram.....Instant Ban. Have seen it 3 times now. I chat with them and they think I am an investor. 
5. They continue to lie on their videos and to their investors and they ban people just for asking a question. They ban or warn for anything that is not an ass-kissing post. Ask Peter K. LOL
So tell me why would you trust these guys if the whole project is smoke and mirrors and they keep changing and moving away from EVERYTHING in their Whitepaper. That whole Whitepaper was just another LIE.
I don't hate IRM, I think they are con artists who have deceived many people.......me included until I woke up but the problem is that they continue to LIE to their investors in the Telegram, every single day I read it there is bans, warnings, non-stop ass kissing and lots of promises and B.S from their monkey admins on there.
Dias is a Criminal and so is Malik. Do not be surprised to see them arrested one day.
One last thing, one last LIE that I forgot, this new (actually old and rundown and full of dust and shit) warehouse they all of a sudden magically acquired from their electricity provider.
(FOR FREE!!) Do you honestly believe that B.S?
They have planned to use that space the whole time and the cave was just an ICO gimmick to sucker people in. Nothing is for free and power companies do not just giveaway their assets, and what happens if they want it back one day?
That will be their exit scam plan.
"Sorry guys but the power company says we can no longer use the warehouse, we are working hard to find a new location.......which will never come.
They are liars and thieves and you might want to re-asses your investments. The value of Rock2 token based on the payouts is worth around $0.05 at most, they are using ICO money to artificially inflate the price. Why? Because they cannot lose if they do, they hold many tokens, 8.5 M from ICO and every token they buy back is more hashing power they do not need to supply to investors.
They are playing the long con.
If you cannot see that then you really need your head read.
IRM = Smoke and Mirrors, lies and deception.