I have been using Swagbucks for quite a few years, and I have maximized my return on time by opting for the cash offers. I am going to share any good money making offers that I find here, so others don't need to sift through the whole site to find the good stuff. If you haven't signed up for Swagbucks yet, feel free to use the link in my signature, thank you!
Gamefly
Pay $10 for a 2 month subscription, get 2,000 Swagbucks ($20)
Paid instantly
This is an interesting one because I figured I could get a few games for my PS3 during the trial. What I didn't know was that they also mail out DVDs and Blu-rays, so this could be useful for anyone who doesn't own a gaming system.
They also emailed me a link for a one month free trial of Hulu, but I already have that so that doesn't help me.
Dollar Shave Club
Pay $1 for a razor, get 600 Swagbucks ($6), stay on for 2 months and get an addition 600 Swagbucks
I received an email from Swagbucks instantly that my Swagbucks are on their way and will be credited within 72 hours. I will then cancel the account after the razor gets here.
Hulu
Pay $7.99 for Hulu and keep the account open for at least 8 days, get 2,000 Swagbucks ($20)
I have not done this one, because I already have a Hulu account. However, this offer has worked in the past according to Doctor Of Credit users.
Raise
Buy a gift card of $20 or more and get 250 Swagbucks ($2.50), wait 30 days for Swagbucks to credit
I have not done this one because you need to be a new member of Raise. However, I have used Raise before and had a good experience. Raise sells discounted gift cards, I normally check for grocery gift cards or Amazon.