Online Reward Platforms: Your Experiences?

I've been seeing more platforms where people can earn rewards by completing simple online activities, participating in discussions, doing tasks, or referring other users.

I'm curious about how people here feel about these kinds of platforms.

Some seem like a good way to make a little extra income in your spare time, while others require a lot of activity before the rewards become worthwhile.

For anyone who has actually tried one:

Was it worth the time you put into it?
Were you able to receive your rewards without problems?
What kind of tasks did you find most worthwhile?
Do referral bonuses actually make a meaningful difference?

I'm especially interested in hearing from Nigerians who have tried these platforms themselves. There are so many opportunities being advertised online, so I'd rather hear real experiences from people here.