I'm debating whether to start this...

I found this on a point-earning app and I'm debating whether to start it. It also has action quests, so I don't know which one is more beneficial. Action quests are like 100 gems for the first install, which is okay, but is there a chance for better quests to appear later? It says 'may be added'... Are there any hidden quests too? I don't know which is more beneficial, the app offer or the quests, so if anyone has encountered action quests or hidden quests, please let me know 🥺