Don't know if it's a strategy but my main money maker earlier game is;
1. Get the ghost girl scene and her game piece day one. Try to use it as often as you can when working when you have extra money buy elf and angel. These 3 and 1 or 2 shaman completely dominate work mini-game. If Anna ever appear as a reward, take it! Work often until you unlock studio and then you can just focus on adding new pictures.
2. Help Mario and use the 2k per week to upgrade your Starmaker page and buy new cameras to speed run gaining subscribers.
3. Buy the gold katana from the shrine and fight every day with it.
4. Any extra money, buy new outfits so you always have a flow of new pictures you can upload.