Why would that be? My understanding is that the Orca project was simply a method to call in the voter info on people who HAD voted, so as to reduce the expense of calling everyone else to remind them to vote. So the GOTV effort should have absolutely unaffected and in the worst case just call ALL Republicans in an area lacking Orca data. I have done plenty of calls to people on election day not knowing whether to not they have voted; and if they have, they usually pleasantly thank you for calling and are even glad to know that there is a GOTV project to help out.
In fact, isn't a project like Orca psychologically backlward for just that reason?