Extra Money online - FREE vs PAID

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I have been trying to make some xtra money online. I have tried some of the free program listed in http://marketingpond.com/ref.cgi/7615/ most of if is free stuff on PTC, read e-mail, free offer. The potential to generate high income? i don't know. Check it out and tell me which one are good. you are welcome to sign up also. I have also tried this SFI Marketing at http://www.quickinfo247.com/9672737/FREE which is free to join as affiliate but to upgrade you membership to executive affiliate require monthly membership about USD30++ I think it's very hard & time consuming to make money using all the free program and only those that sell stuff & charge $$ for membership can generate sufficient income online, especially for those not resided in the US? if any body disagree please lead me to the program.. What do you all think?