Seriously, unless you're deeply passionate about the vision of the company you're working for, it's super important to keep tabs on the market and leave companies that are (for lack of a better term) taking advantage of you. Unscrupulous employers, especially traditional scrooge-mcduck-business-entrepreneurs, will try to squeeze you as hard as they can while paying you as little as they can (a good rule of thumb for spotting these men and women is that they're in their business just to make money, not to chase some "nobler" vision). So it's critical that you get out as soon as you can not only because it'll be better for your financial and emotional well-being, but also so that you don't lower the market wage average of your profession and wind up hurting all the other people in your industry.