All reward was depending on how much you are wagering in the current weeks/month, so when you are not playing anything or wagering you will not get any bonus at all from stake.
Hmm I do not think so, I believe even if you were not wagering during the last week/month, we will still get the bonus especially if we are VIP members. Even I know some non VIP members who do not play for weeks or months still get the bonus in a form or daily reload but of course the amount is small.