Will the "sale" go through? Yes

Will your card # get compromised? Probably not

Is it a good idea to create a paper trail of your illegal activity?  Well, what do you think?

credit cards

have used them several times..i only use them with providers i have previously seen or agencies i trust..

It works well for me, but it's not for everyone.
I like to make the option available.
It just saves us both a trip to the bank, et cetera.

..if anybody but yourself is likely to see the statement when it comes in the mail, it's not recommended.

Even if nobody but yourself is going to see the statement, I think you should be very sure that the provider has a company with some extremely generic name.  Seriously, would you want to have a credit card statement with a charge on it for, say, $1500 on it from "SexySarahCums4U"?  (To say nothing of the accompanying charge on the same date from some major hotel)

A good provider who takes credit cards will have some sort of generic sounding business like "XYZ Software Solutions", which is far less likely to ring any bells with anybody.

And I'll say it again:  If you want to avoid carrying cash and/or trips to the bank, and would rather not use credit cards, ALL providers and hobbyists should look into settling up via Bitcoin.  It's just about as anonymous as cash, does not require that one party arrives and another leaves carrying large sums, and in general is an all-around Good Thing for transactions such as these.

Any provider or hobbyist who wants to know more about how Bitcoin can facilitate your enjoyment/profit, start googling away, or ask your favorite geek/libertarian-ish friends about it.

If you come up empty (or still have questions) afterward, PM me, and I'll try to help you out.

If Provider forgets card swiper which happened to me the trip to ATM or bank can be an issue.

Yes, they are fine if you have nothing to hide.

No, if you have something to hide.