I personally love both.
Fusion cash the Radio, Forum, posting pic, PTC, videos
Inbox emails do not decrease.. they increase.. and you get several a day. You have videos here too. You get paid to use coupons.. that is a definite PLUS. I earn a lot of money off of the coupons. I print out coupons for others that I know.. that use the products.. that alone adds up fast. Yes they charge for your check.. but then turn around and put that back into your account. Inbox has tons of 100% free offers.
Persoanally I get more checks from Inbox, but love the features from both!
If I could get the fusion toolbar on Google Chrome I would be able to search on there.. but for some reason it will not install on google.
**It never hurts to do more than one site... You get the best of both worlds..
Happy Earnings!!