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".
No. That's not how the law works. ANYTHING can appreciate or depreciate in value post-purchase. IOTA is software. We got 2 documents: Terms of Sale and Risk that EXPLICITLY state that IOTA IS NOT either securities or investment, it's SOFTWARE. NOTHING MORE AND NOTHING LESS.
This is the same for all software and crypto-software, including Ethereum, Augur etc. This is the law, done deal.
I can't believe you have bitten this hard on the bait of a troll. Haha, smarten up man.