What offers have you done that work?
The videos and the quizzes/surveys. The videos are quick but small amounts, and the quizzes/surveys take forever but give you about 133-152 or so. The info you give can be a problem for some people, but I'm not really bothered by it. Email addresses and phone numbers can be changed if I start getting harassed, but for now it's alright.
How much cash have you gotten from these offers/what offers have you done?
The Onlive video is apparently repeatable. So I've gotten 12 from that once a day, and whichever ones show up in the videos section usually gives me 4 to 9 a piece. The surveys are 133-152. So far I've gotten up to 764 Gaia Cash. I intend to spend it on whatever items they show tomorrow/through the weekend. :3
What offers are safe?
The videos are the safest. No info to put in, no worries. If you have to click on a banner though, make sure you have whatever program you use to keep your computer safe turned on. I haven't run into any problems yet, but I definitely would advise doing so just to stop any problems before they could possibly start. Also, the quizzes are very safe. You don't have to fill out the other offers they try to suggest to you, just skip through the offers. It takes a few minutes, but it's possible. Finally, the surveys are usually very safe because they're from research groups looking into general public opinions to company products. They aren't trying to advertise anything, just see what you honestly think about something.
Anything to do with the cash offers and the best ways to use them.
Best way is to actually put in real info. It's kinda against the rules on Gaia to be putting in bogus info. I'm not sure if it's an offense you can get banned for, but I know they really look down on that. Just use an email that you don't really check all that often and don't mind getting a few silly emails in. As for the phone number, don't pick up the phone if it's a number you don't recognize. Simple stuff like that. Also, I would highly suggest amassing a large amount of cash, buying stuff this weekend during their black friday sale, and then selling it on the MP for a quick profit. I have a wish list that's going to end up being a mile long if I don't start picking up items, so this is a very decent way to get some quick gold. Plus, if they put out items that you really like, you don't have to worry about spending the gold on the overly-priced options in the MP. You can buy it directly with some gaia cash you earned for just taking a little bit of your time to tell surveys your opinions and watch ads. :3