I met with a provider once who told me she accepted paypal. Is that common? Are there many providers who do that?

I stick with cash; no electronic trail.  Plus if Paypal figures out she is using her account for illegal activities, they will freeze it.

They freeze the account and keep the money. I ve heard it s very hard to get the money back as well.

An honest question, why would anyone want to use any other form of payment other than cash ?

For some it's similar to cc. You can charge it and either make payments or pay it off. It also might not draw the attention of a spouse where a large cash withdrawl might.

As opposed to payments to an unknown PayPal account?  I would think it would be wiser to make periodic smaller withdrawals and hold on to the cash until needed.

Although some don't plan on dates they decide spur of the moment and PayPal or a cc might make an appointment happen that otherwise wouldn't.  
       I ve never done it but can see situations where one might choose to.  

Thank's for the replies T.O.C.& VOR .

It lets you load up to 500 per day. It can be purchased with a CC, it is anonymous to sender and receiver gets the code to enter into their account. It's untraceable from SO's point of view. Sometimes for deposits it is "safer" to use this route than a cashier's check or money order. (just make sure a LADY with credible reviews is the one receiving the message.)

If the SO looks at the credit card statement, how do you explain the charge?