I got my 3 for 1 credit report last week and I didn't see my Juniper and DMB Webmiles in the report.Both accounts were opened in last Nov.
My Web Miles account is not listed on any CRA reports - maybe they only report if you are delinquent.
I have heard that DMB is now reporting to the bureaus. Maybe you should call customer service or write a letter requesting them to report your payment history to the bureaus. Good luck!
If you want your DMB card reported to the bureaus, fax a request to the following: Metris Co., Inc 918-610-7910.