I tried Shoppers Nest for over a year and got nothing out of it. By the given address of Shoppers Nest seems to be run out of a co-working space.
In general I have found that companies that can only provide games of chance, in this case lotteries or sweepstakes, are impoverished and can't fund meaningful rewards program. The really impoverished, or unethical, ones demand some of the members accumulated rewards to enter. In that case the members are actually financing this gambling and not the company. This is a very good indicator of poor company ethics. I have never won anything, but grief, from such companies and stay clear of them now.