Hey great topic! Here are my 2 cents
Well, regarding to this topic I like to collect data and observations about women with really big enhanced boobs and this is what I have found out:
Of course there will be more women like Beshine or Chelsea, it has already happen with Ample Ann and they are coming faster then you may think. The time between the apparence of Beshine after Chelsea and Ample Ann after Beshine is shorter. So the next woman is going to come pretty soon...
But I believe that most of this women are going to be private persons and "huge enhanced boobs lifestylers". Beshine and Chelsea are definitely lifestylers, their prime reason why they have such boobs is definitely personal and after that comes the money. Most huge boobed models/pornstars have this kind of boobs because of the money, once they have earned the desired amount the make a reduction and desappear, usually after just a couple of years. Chelsea for example is already a very long time in the business and has outlasted most of her competitors, and looking at her actual "products" I am pretty sure she doesn´t make it for the money, so I dare to guess that she has already earned more than enough and she could have retire long time ago, but hasn´t because she likes her life and her boobs. As far as I have noticed lately, there is growing trends towards huge implants (3000cc, 4000cc and bigger) but most of them are women who do that mostly do to personal reasons and many aren´t even trying to earn some money with them.
I don´t think that a woman would be ever go that big just for the money and that´s because
* of the amount of money needed to achieve this size, the risk involved, the life with such boobs,
* the limited amount of men who are truly into that size of boobs and are willing/able to pay for it,
* she would definitely have to compete against Beshine and Chelsea for this clients and
* this is going to be very hard because as far as I know this women make that much money thanks to the very loyal fans they have (Beshine has around 1000 fans that regularly paid for her site). So I think that as long as Beshine and Chelsea are around I only see business for one or two more women and only if they provide much better products/real porn/sex services.
If today a woman wants to make money with her boobs she definitely needs a size where she can attract the biggest part of the big boobs fan comunity, but she is going to have a lot of competition by other women and even so she can´t today earn that amount of money as 20 years ago. Just compare the stars of the 90´s and the upcomming models of today, many are bigger, prettier and with better work and products, and still they don´t even get a quarter of the success of the former ones. I have often heard that many models have quite a hard time earning some money, let alone getting wealthy or rich.