How is it possible for former promiscuous girls to still get married?

How did they still manage to get a man to marry them? Even a former hooker (she hasn't worked in that for 10 years by now) others in my area knew still got married. The guy knew her past. One of my friends had a wild past and she already got married last year. The guy also knows it and she's now 2 months pregnant.

If men don't view them as wife material and instead just use them for sex or keep them as a girlfriend without a proposal... how do they still get a man that marries them? Some or many of the guys that marry them know it.

How do they do that?
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meanwhile my older sister is a good, decent girl. She's only been with her boyfriend (no other man) and he tells her all nice things, that she'll be a great mother to his kids one day, that she's a gem, that she's the best thing that ever happened to him, blah, blah... and they've been living for 5 years and he hasn't proposed yet. She's sad right now and even she is shocked that even 2 former promiscuous girls she knew got proposed already at a much faster pace.
How is it possible for former promiscuous girls to still get married?
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