If you have a fledgling website that is just getting off the ground I can not stress the benefits of writing freebies. This applies to most websites, but in the case of erotica it may be one of the best ways to get your name out there.
There are many erotica/story sites out that that publish for free but will include a link in your bio if you request it. If your story is extraordinarily good readers may be willing to check out your pay-site. No matter what site you are writing for, make sure you are submitting quality work. Give them a good example of what you are capable of.
Some of the places that publish previous published work but include linkage with your story:
The Erotic Woman
Erotic Stories (this site doesn't include a link in your story but it does include a link in your bio)
Look for more and you'll easily find more than you can count.