Looks like a d/b/a will be the hot Christmas gift this year.

It only costs about $300 to register a Delaware LLC.

Yearly maintenance costs and some states require you to also file as a foreign corporation doing business in the state.

Yep. YMMV. DE is the most corporate-friendly state, but usually requires 2 state tax headaches. For a very small concern, it might be more costly than registering in another or one's home state.

$99 to register an LLC in Ohio and it takes about 15 minutes online through their website. Free to get a federal EIN.

IIRC - Once you file for an EIN then you also have to file state sales tax returns, even if sales are $0.

With a single member LLC it is just an extra form on your personal return at least!

Someone will probably turn this into a service to make it more convenient.

That might work until too many people figure it out, then the constraint will be put on business too