It is profitable. You won't get rich but you get some beer money out of it. Remember that you put $5/month in a VPS and get like $50+ (at current price).
It's more like a 140$ from 5$ investment on average (~50 000/1400 * 0,14 * 30) currently. But trolls don't use math and arguments supported by facts. They create false accounts post "good project" and then from other accounts posts:
Well.. I didn't made an in depth math for how much you really earn, I just made an approximation of my Idena earned in the last 3 days ($5) * 10.
Looks like we need to just don't pay them too much attention as this will lead to an endless conversation with them. Let's just try to ignore them and maybe they will stop trolling.