I would say it would be useful to include it anytime funds are escrowed with someone who is trusted within the community (I would say in the description, not the chart). You would also potentially add a y/n column to say if funds are escrowed or not.
I might also mention the maximum potential payout per period verses the total amount escrowed (in the description) so users can get a good idea as to how well they are protected.
Adding more information about escrow to the description: Good idea, will do.
Add a "Escrow"-part to the table: Good idea, will add that
Maximum potential payout per period verses the total amount escrowed: Sounds like a bit of extra work. Might do that as well.