Here is the thing.
You make a transfer as ordered from Sola ICO webpage.
The generate a unique ETH address just for receive from you. Let's say: 0xcc8c050e247d2de9fbf53611b141020ee0ecdf10

https://etherscan.io/tx/0x3af0715b9fd3c74ad680fe86ff424723fd41bca9143116aa649efa48f6f631cd

As soon has ETH is received, its is moved:

https://etherscan.io/address/0xcc8c050e247d2de9fbf53611b141020ee0ecdf10

So, from there is moved to another one :
https://etherscan.io/address/0x95fe74e792a3b8bac30e33261d28e64921b50c37

And, man, from this account there are incomes from a miriad of different accounts, and eth is moved to a few ones:
https://etherscan.io/address/0xd600fabf28fd3b05540dac31a7adf0737323dc96

Internal transactions points to:

https://etherscan.io/address/0x209c4784ab1e8183cf58ca33cb740efbf3fc18ef

Which is Poloniex_2


Added:
As informed in the telegram chat, it seems openledger.io is used as escrow (https://openledger.info/itos-icos-and-tokens/)
I gues they work with Polinex...

I am not accostumed to this, the former ICOs I have invested there were always in one isolated account. So let's give time and a vote of faith to Sola Foundation and let's see how this tunr out.

Good luck Sola. I hope your Social Network is better than f**** Facebook