Hello,
Good Day..
May i ask what is the function of Escrow?
Thanks?
When someone who is not really known on the community opens a signature campaign, Its very likely that no one would trust him and advertise his service for one week as there is a risk of not getting paid, to add some trust to the equation, the owner of the service gives the bitcoins to the escrow so whoever enrolled into the signature campaign knows he will get paid at the end of the week. The escrow is clearly a reputable and trusted member on the forums otherwise It wouldn't make much sense.
You can also use an escrow while trading with individuals and It works pretty much the same way. The buyer gives the funds to the escrow, the seller gives the goods to the buyer, If the goods were as described and everything is okay, the escrow release the funds to the seller.