When I saw Wang at a con he said they hardly make any money from syndication, dvd's etc..
Though what his hardly any money means I don't know. He talked about it like they get a couple hundred in the mail every few months.
That sounds about right, when is the last time you saw Voyager on TV? Anyone who was going to buy the DVDs already has. Voyager isn't really the show everyone is running out to buy action figures, trading cards, etc. these days.
If Voyager isn't making the studio much money right now (because they're not doing anything with it) then he wouldn't see the payouts. It's almost guaranteed he gets one of the lowest cuts out of the cast as well.