Hi Slurpxe,
Apparently, you tried to have free credits by filling offers, surveys etc ...
It is true, that some surveys are complicated to complete and sometimes it is hard to earn credits.
In fact, it is normal that it is difficult and if you have been rejected by these surveys, it is because certain surveys are looking for specific people, who answer their criterias. For example, a survey that is about cooking, they will only take people who have answer the criterias on "cooking".
On the other hand, if the surveys are long, it is normal too, because surveys contain a lot of questions, in which the more questions you answer, the more you earn credits. I have some tips to give you, tif you want to earn free credits more easily;
First of all, try to earn credits from your phone, with the application "IMVU", offers and surveys are easier to make and fill on phones than on the computer. In addition to that, there is a "support" button that allows you to see, the offers and the surveys that you managed to fill or not.
Then, always make small offers that are easy to do, like for example, some applications to download, or to confirm your email. Granted, this gives few credits (200 credits to 800 credits), but if you do them all, you will earn a lot in total. Never make the paid offers, it is useless, as much buy credits directly on IMVU. And here it is, for the moment, I hope to have helped you with my little tricks. And thanks to me if you become rich thanks to free credits ahah.