Here's another "recipe". Again this is theory and I'm not sure it works as is, but it should generate ideas and twist it for your own uses.

...And this is a blackhat account creator method.

Prep:

Use Scrapebox to gather and check proxies. You'll need a bunch. Save as text file and close Scrapebox.

Open:
text file in any text editor that lets you "tile" the windows.
Ghost Control
FF
Install/config "proxy switcher" FF plugin to work with your proxies. Have it switch every minute or so.
Open CCleaner
Go to site account creation page

Start Recording with Ghost Control.

Open and run CCleaner. Make sure to give Ghost Control enough time for CCleaner to run and for Proxy Switcher to change proxies.

Have a text file for each field, such as:
user name.txt
passwords.txt
email.txt

Open each in "tiled windows" in your text editor.

Use Ghost Control to switch between each open window, copying a line, then switch back to FF and paste in the info into the site's forms.

Repeat up to the number of times equal to the number of lines in the smallest text file.

If you can get this system down, it will be easy to make an account creation tool for just about anything. It may be slow, but you can probably make your needed accounts in less time to find, buy, download, install and learn another account maker, assuming there is one.

And by using CCleaner each time, it will be pretty safe.

If you want faster, you can try a different method for swapping proxies, using the same proxy 2-3 times or not running CCleaner each time, etc.

The key now is really the proxies...More on them on another thread.