I think that if you're making 1 million an hour you're spending your time enjoying the game instead of trying to make money (and this is fine, I'm not saying this in a bad way). The problem with this is that if you were ever to decide you wanted to fly a large ship, you'd be grinding for 1000 hours if you stuck at the 1mil/hour rate you find fun which for a paid game seems excessive.
True, but currently the game's not very rewarding for those that want Elite. I'm not even in the game to get Elite and I don't find the super long grind rewarding. I just want to fly the ships I want in a game I paid for without having to grind as much as I would expect in a free-to-play game where you unlock things.
I have been enjoying it, yes. Mind you, I just worked out that on average, through my commander's life.. I have been making ~500k per hour.
That's roughly 12 hours (or around a week or more) game time for a single rebuy