Do steem engine miner tokens make money?

Hello, does anyone out there own Leo miner tokens? I bought 10 around month back as a tester and i have to say i completely forgot i had them until this morning when i looking through my wallet. This leads me to think that they are worthless and not a very good investment. I think i paid 6 STEEM each for them and i have no idea if the return as i noticed completely no difference in my rewards. I use the tag in some of my posts and they never earn more than 1 are 2 LEO a day. I think from i last stacked around 2 weeks ago i have earned around 19 Leo which i think is mostly from payouts.

Do you own any miners?

What have been your expeniece's with mining tokens? I think i might not have set it up correctly are something, i bought them and staked them. I think that's right? It's only 10 but i thought i would have at least noticed some sort of different. Right now it looks like just buying LEO's would have been a better play.