erewards domain is owned by:

e-Rewards, Inc. (EREWARDS-DOM)
8401 N Cntrl Exp, 1000-LB
Dallas, TX 75225
USA

Hal Brierly is the co-founder of erewards.

Brierly & Partners
8401 N Cntrl Exp, 1000-LB
Dallas, TX 75225
USA
Phone (214) 760-8700
[I think that number may give best results]

Admin and technical contact for website (in Farmers Branch TX)
(Probably shouldn't use this number)
972-910-8442

Absolute last resort:
For advertising on erewards 1-888-20email

But, you may want to try email first.

Good luck!