Coinomize will send the rewards themselves for which I am eternally grateful. I'm quite thankful that they still chose to constantly communicate despite what happened.
And since someone has bump this thread, it seems that this work around has been smooth for you and the campaign itself. And there are campaigns in the future who might do the same setup, or have someone hold the escrows.
So I guess everything is going to be ok with this two, it's up to the project themselves what setup they want.
Or if the campaign managers are going to offer this kind of setup for the project.