Jinn buyers, according to the claims made in this post. I don't know whether they are correct or not, nor do I know whether your posts are correct. I only know what I read.
According to that dictionary definition people purchasing or expending money on IOTA tokens are also investors, unless you are going to prohibit IOTA tokens from ever being traded (not sure how that would work) and only allow them to be used as network access. They offer "potential profitable returns, as interest, income, or appreciation in value".
There was a lot of misinformation spread by those who wanted to sell JINN for as higher price as possible. Maybe they were just scammers, there are a lot of them in cryptospace. Also note that sometimes I use word "investors" because it's much simpler than to explain all the details. It's just a shortcut and any attempts to catch me at my word are silly. Without
the context "investor" can mean anything, so I'm not sure it's a good moment to quote Merriam-Webster dictionary.