ScriptLance should not hold escrow after milestone completion

I was working on a very big project with multiple milestones setup. The buyer was communicating well and completed some payments but half way through stopped responding.

Now the work is complete and no way to get the buyer to communicate with me or SL. The milestones have been marked as completed. Why is it SL policy to hold this money [over $500] in escrow?
I feel this is a cheap way for an otherwise very good platform to make money by not releasing cash when the buyer stops responding in the middle of a large project when all the work has been completed and proof submitted just because it is over 30 days old! Some projects take longer than expected as requirememnts change or bugs need fixing.

I suggest we go back to the old rule of waiting for 7-15 days for a buyers reply and if not complete the payment since the programmers has worked hard for it.