I didn't count how many new fans appeared after the Orcs, as I don't have such statistical information, but the fact is that the Heroes series itself isn't the kind of game that attracts millions of players worldwide; the format is a bit different. Turn-based strategy is quite rare these days and appeals to a niche audience. It's unlikely that many modern players would get hooked on such a game, and most of the fanbase seems to be concentrated in Eastern European countries; I don't know why. Therefore, I think that the sales figures for Heroes 5 and its expansions are satisfactory, especially since there is no DRM at all, unlike Assassin's Creed with its online protection.
Демократия есть одурачивание народа при помощи народа ради блага народа.(Уайльд Оскар)