An RV copywriter's opportunity for advancement isn't what it should be, especially if this is your entry-level or re-entry level gig. To make this a more pressing concern, prepare to be grossly underpaid, even by starving writer standards. As a writer or creative type, you'll always come second to the number-crunchers. After all, it's a technology and analytics-driven company. Actually, you'll probably come third. They come first and their interns second.
The actual work can be fun and fresh, or mind-numbingly painful. There's little-to-no say in your day-to-day projects. But you'll get plenty opportunity to expand your horizons and take on extra, higher-level work if you both prove yourself competent and ask for it. Again, don't expect the pay that goes with it.
In Conclusion:
If you start your copywriting career at RV today, you're not going to be there in three years, probably not two, many last less than one. But you can learn a whole lot at an accelerated pace, so when the time comes, you can speak intelligently about copywriting and online marketing in ways that those competing for the same job prospects can't. RV labels itself a "career catapult." I'd say that's fair, though so-called writers in Charlotte are in high supply and low demand. If you're talented, you'll make it out the other side. Grind it out. Have great times with coworkers. And know that you're not stuck there when you get to a point where you feel like you're running in place.