Pimps essentially brainwash vulnerable women into thinking their lives would be better and earning potential higher with them. I once had a "pimp" at an upscale club try to recruit me when I was in my early 20s, and was promising me that I'd live in such a nice house and drive in such a nice car and I laughed in his face and told him I can already afford those things and manage my own money. After that I'd never even speak to a man if I thought he was a pimp. I also generally stayed away from dancers who were known to have pimps. They can be very desperate, because pimps are expecting them to come home with a certain amount of money.
Pimps talk a very smooth game to vulnerable girls to recruit them. They really make them think they will make their lives better and help them "manager their money" (ie take it all and tell them how they can spend a portion of it). They make it sound glamorous, and they might have one or more of their other hoes with them dressed in designer handbags and whatnot to create the illusional of fabulous wealth. Generally, they will have a "nice car" to drive around in to keep up appearances, but it is shared with all the other of the pimp's hoes and none of them actually own it. Same for the house all the hoes live in, whether or not they live with the pimp or not varies.
Then the pimp will obviously make the hoes work. You have to work x days a week and bring home x amount of money. Let's say there's a pimp who has four hoes. He's nice and lets them each take two days off. So they have to work five days a week and make at least $1K per day each. So let's say each of them are making 20K per month minimum and giving it all to the pimp. The pimp in turn pays for their housing that the hoes all share, and pays for the car that the hoes also share. He takes them to get their hair and nails done so they feel pampered. Might take them out shopping once or twice a month and buy each of them maybe a $1-2K handbag each month, and some designer shoes, belts, etc to match (but remember, they will share a lot of these accessories). Still, the hoes feel spoiled when they see the pimp drop 6K or so on a monthly shopping spree for them, even though if all four hoes are making their weekly quota, they'd made the pimp 80K for the month so that 6K is a drop in the bucket. They don't see it that way because they have no idea how to budget and are indoctrinated by the pimp to think they're being lavishly taken care of.
And yes, for girls who are already prostituting themselves, pimps are obviously an added layer of security. But pimps pray on girls who again are vulnerable. Often times these girls come from poverty and/or don't have supportive families, so the pimp recruits girls who are easily swayed by designer bags and shoes and shiny jewlery, nice cars, and the idea of having a "family," like a "father figure" in the pimp and a "sisterhood" with the pimp's other hoes. That way they're completely reliant and think they have it made while the pimp collects all their money and has complete control over them.