What happens when VirWox claims unauthorized transaction and they pull all your money from account. You are focusing only if the payout will happen, you are clearly being paid by a third party. (or if all the posts are fake just a screenshot from legit regular trading at VW).
Actually this is much safer than any other Bitcoin-Paypal service. They are using Virwox, which means they are avoiding the direct Bitcoin-to-Paypal transactions, and in that way they are avoiding any possible actions from paypal.
If they send money directly (instead of using Virwox), then there is a possibility that paypal may decide to freeze both accounts.
The amounts i received are the same as the initiated transactions, so they are synchronized for sure.
Even in btcto.money's Terms of Service they clarify that the payment may come from Virtual World Services.