First off, that to me is a sign that it is a bot who contacted you - recruiter bots are absolutely sophisticated enough to pull details out of your profile to make it sound like they are not a bot (Thanks, LLMs!) Actual recruiters tend to be short and snippy, just to see if you respond before getting into any conversation at all.
That being said, even if this does turn out to be legit, you are just signing up to be part of them scamming their customers. If one person does interviews, while someone else does the work, that is what we call a lie.
And even if somehow that turned out to be reasonable, splitting profits 50/50 just for being part of a sales effort? Too good to be true.
This whole post sounds like a big old pile of red flags to run away from.