Meghan will absolutely benefit from dating Harry. Meghan is what I call a hustler, she is a supporting actress on a basic cable show and yet she has a clothing line and is a UN appointee, actresses who are much better known cannot claim those accomplishments. If Meghan and Harry get married, Meghan will benefit by becoming a member of the British Royal Family and all that entails - tiaras, castles, swanky title, etc. Yeah, it's not all rosy, but becoming a member of the British royal family comes with perks and a platform that will allow her to continue her humanitarian work and advocacy. As far as what will happen if she and Harry do not go the distance, take a look at post-Harry Cressida Bonas, Cressida has scored fashion campaigns, magazine covers, and sits on the front row at major fashion shows, I have no doubt that those same things will come Meghan's way, I suspect that when you toss in Meghan savvy and moxie, with or without Harry, we will be seeing much more of her.
Again I think Meghan is a hustler, and regardless of the outcome, I think she is going to parlay her relationship with Prince Harry into bigger and better things, I think that's just how she's wired, but just to be clear, I am giving her the benefit of the doubt that when it comes to her attraction to and feelings about Harry. One, Harry is far from being a charmless ogre, and also, if you look at previous men she's been in relationships with, Harry seems to be her type, so I have no reason to believe that Meghan's interest in Harry is solely opportunistic, but, regardless of the outcome of the relationship and independent of the genuineness of her feelings for Harry, opportunities will come from it and she will take advantage of them.