Ok I figured out a work around from this post: XSODATA IS NOT WORKING  WITH 'COUNT' AGGRE... | SCN
Now to get the number of users I query URL ....xsodata/users?$select=USER_ID&$inlinecount=allpages&$top=1&$format=json, then get the __count value from d.results
To get number of subscribers, I use regular oData URL ..xsodata/users?$select=CNT_SUBSCRIBERS
I expect one query to get both number, now I have to use two....