There are loads of good opportunities online to make a bit of money - sure, it might not turn you into a millionaire but it helps with some extra spending money. There are also some online sites where the juice isn't worth the squeeze so to speak - the time taken to earn anything decent is way too long for what you actually get in return.
Do you have any sites that you'd say to others are simply not worth the effort involved?
Based on experience, the "earn money using mobile apps" where you play games, watch and/or download videos, do some simple tasks are the ones that will require effort and time for you to earn pennies. Some use autopilot schemes along with several mobile phones using the same app to monetize. For me, I only maintain a few because I enjoy playing the games.
There are some Facebook connected apps where you simply watch a certain amount of music videos to earn you a sort of like a ticket for daily lotteries. Chances of winning is at its bare minimum and unless you enjoy watching repeated videos, I do not recommend them.
I tried typing captchas for only a day and ended after 2hours of typing physically tired and with an eye sore.
For survey sites, you need to check survey reviews before trying them to have a glimpse whether they really pay and manner of operations coming from active or inactive users.