Answer from e-rewards team concerning issues we have lately with (no) posting of points...
Q: I completed a survey but my balance did not change.
A: Most surveys are credited automatically but some can take up to 7-10 working days or longer for follow-up surveys. Longer term and more in depth studies do have longer crediting cycles while they are processed.
However we have experienced a technical issue which has prevented some credits from appearing. Our team is working to make sure all these are credited to your account in the next few days. Please accept our apologies for any delay.