you just register a new email. YOU (and the other scammers like 99essays) are afraid to have a website because then the scam would be short-term.
i'm not the person who posted that add, but i have posted similar writing advertisements.
you clearly have no experience with sites and are naive. i've worked for all the major sites and most of them are based in eastern Europe. They don't think twice before sending you second-rate ESL material and will refuse to refund your money. conversely, i write my essays as if i was writing them for myself or a family member.
by establishing a relationship with a writer, you get more value and consistency as we don't have to share the overhead costs with the company. sure there's some initial risk, but this initial risk comes with great long-term benefits.
i agree it'd be nice to own a website, but after you factor SEO placement, hosting, etc. it's an expensive and time-consuming venture that is a challenge for a solo operation to pop-up over night.