Best strategy for horrible structure?

[starchyy]

I recently played in a charity tournament where the breakdown was as follows:
-Start with 1.5k, blinds at 25/50
-Blinds go up every 15 mins
-Buy-in for $100, rebuy for $60
-Add on at the break (3k for $60)
-300 entrants, top 10 pay
-10k for first

I was wondering what the optimal strategy here would be. Obviously the players are horrible and don't like to fold. How do you play this? Do you even bother rasing pots pf or do you limp in and see a flop, bet when you make a hand or fold and get away cheap? Is it even worth taking risks during rebuy period and rebuying or do you scrap that idea and hope to build your original stack?

I am only asking these questions because of the blind structure. Here it is:
-25/50
-50/100
-75/150
-100/200
-200/400
-300/600
-400/800
-500/1000
-1200/2400 (100 ante)
...and so on. Remember the blinds go up every 15 mins.

Discuss.