I don't believe that they are still in business.
I've used Growthstore since it was publicly available and I have to say that I'm impressed. Their support team went above and beyond accommodating for my needs and I'm super happy to have found them :)
Looks like a really neatly packaged startup. Love the ease of access to purchasing services without sourcing different freelancers (and having the worry of whether or not they are good/bad), and I'm looking forward to how that'll come together when you launch. Good work!
I have ordered the "Instagram Growth" gig, and I have to admit that it works just as advertised. It took me one year to manually grow my account to 800 followers, and these guys tripled my followers in one month. I will definitely continue to work with them.