You can’t ask sensible questions here! This is purely speculation and a finger in the dark! 
I’m guessing (it really is a wild guess), that if they have X number of people signed up, it’ll be more attractive to potential adopters of said future currency.
Below is a FAQ for anybody that wants more information. I still have 1 more space people!
Do you have to lower the tone?
Was any harm done? 
If anyone else would like to join what feels like a potential, but free, pyramid scheme, please find my referral link below!
Another one signing up, just because… So, if you’re looking for an invite:
Initiative Q is building a new payment network and giving away significant sums of their future currency to early adopters. It’s by invite only and I have a limited number of invites. My personal invite link: https://initiativeq.com/invite/HUt0ReK7Q
I’m in too! Thank you for the link. 
if someone want to try it I have 5 more invites through this link.
if people still need an invite they can signup through my personal invite link: https://initiativeq.com/invite/SPO8fHYXX"
Likely never, looks like an email harvesting operation with a “FREE MONEY” dangled carrot to me.
Can’t beat a free carrot… 
Think they need to decide on what product they’re creating first
Speak for yourself.
This week I’ve bought 3 houses, a railway station… AND I paid to get out of jail.
I never was very good at Monopoly…
So what is going on with this then?
nothing… not rich yet… dang
You mean you haven’t cashed in the £300,000 yet?
Honestly - I have no idea - I doubt it’ll be a quick thing (if it’s even a “thing” at all).
I forgot my login but I want that monies
My two cents, the guy seems to be legit, there’s almost zero down side to this, and for those who had suffered a severe case of FOMO after missing out on the bitcoin craze, why not try this?
So, if anyone needs invites, here’s mine:
https://initiativeq.com/invite/HNdlzq1w7
Paging Danny to verify me 