I agree. Unless you are in an environment where there are very specific pay scales for fairly specific positions and levels, with lots of chances for advancement (e.g. Google or the like), expecting a significant raise at your current job is unlikely unless you have a lot of leverage. Put another way, you've been giving the company the extra work for free. People (and companies) don't like to pay for things they're used to getting for free. That just feels like an unnecessary expenditure, so is resisted.