Using Free Solo Ads more than once

Hello,

I`m rephrasing an older question I`ve put here on the forum.

If I use a Free Solo Ads provider to test it`s email list and I do that to multiple solo ads providers until the free testing that they offer is gone(say one solo ads provider offers 5000 emails).
If I want to do business again with that solo ads provider will I need a different IP or just a new email and make a new account