Hi! I see you’ve been watching lots of ads in Stealth Master but still only have 4 characters unlocked. That can feel a bit puzzling. Just to understand better—are you watching the ads specifically to open red suitcases, or is it through some other way? Also, which characters have you unlocked so far?

Meanwhile, from what I've seen, unlocking characters in Stealth Master can be quite slow and often depends on luck with opening red suitcases you get by watching ads. Some players report that even after many ads and contracts, certain characters like Lora or Snowy are hard to unlock because they have low drop rates in those suitcases1.

To help improve your chances, here are some steps you can try:

1. Make sure to always watch ads when you're given the option to open red suitcases, as they contain character unlocks.

2. Play as many contracts (levels) as possible; each completion can sometimes reward a suitcase.

3. Check if the game has special events or promotions where character unlock chances increase.

4. Make sure your game is updated to the latest version to avoid any bugs affecting rewards.

If you’re already doing this and still stuck, there might be limitations built into the game for character unlocking speed.

Could you tell me how long you’ve been playing and if you’ve noticed any differences after watching ads or opening suitcases? That way, I can guide you better!