Maybe. They don't disclose such info.

They raised $4.2M on presale.

since they already raised 4 mil $ then it shouldn't be hard to raise another mil in the ICO.

cant say exacly how much if using pkt value.
because some investor already got bonus addition for their investment!
according from playkey ico website https://playkey.io
Bonus stage I: 6 971 877 11 931 300 PKT
they already sold out about 7 million pkt with $4,2 million raised from presale

I think this will fit perfect for VR devices. Many gamers don't have the hardware to play VR games but this will make it possible.

I think VR becoming a common tech these days and even giant like google is trying ways to make it simpler. Lets see how Playkey will implement it or not.

One weak spot is the RoI for miners.

The PlayKey subscription fee, and therefore the amount of money PlayKey miners can earn, is limited by the monthly fees of PlayKey's competitors. DigRate estimates miners could earn $150 a month, which means it takes more than a year to earn back the hardware. If you add the electricity cost it will take even longer.

Electricity cost is not calculated by DigRate, so let us do the math. Assuming a usage rate of 50% with the computer drawing 250 Watt that means 3 kilowatt a day. If 1 kilowatt costs $0.15, that is $164 a year. It will take over a month of mining to earn that back.

So, if gamers play ~20h and pay 20$ a month, it would mean that all money moves from the gamers to the miners, without any profit for playkey?

What happens if the gamers play more?

Can powerful gaming rigs run several games at the time?

yess.... more gamer are using dezentralized playkey and miner will get more income.
+ if pkt token succefully adden into major exchange. i believe all playkey holder will get profit more than 50% rising price

nope the miners do have to pay a fine to playkey. i think it was about 25% of what they get and the times were relevant too, where they can mine. it depends on the network latency afaik.

How money moves from gamers to miners? I cant understand  
Gamers will pay to devs...