The overall key IMO is to get as many people as possible to start voting on June 12. Unlike Chase, this is a marathon not a sprint. The number of days we have to vote is critical.
For example, charity A starts with 300 people voting per day and charity B starts with 400 people voting per day. In one week's time, charity A has 2100 votes and charity B has 2800 votes. Now charity A adds another 100 people on day 8 on the contest, they will always have this 700 vote gap that they will have to make up and they will have to get more people than the 300 that charity B has, to make up the 700 vote gap. It can become overwhelming difficult to make up that gap as time goes on!
If other charities have more people than us starting on day one, we could be in trouble. In order to leverage our votes, our goal should be to get everyone on board to start from day one, not to pick them up in the middle of the contest like we could do with Chase.