I have been using tron.ac for a few months now, heres an honest opinion:
i started on the same 600trx as everyone else, i invested 150trx to get the withdrawal unlocked and the ability to withdraw 3.12trx p/d this has now dropped to 2.5trx p/d (which i believe is due to general crypto price dropping), i figured as long as it lasts long enought for me to get my 150trx back im happy, so far i have gotten around 195trx total, so im up on my investment.
I just crossed the 30000trx accumilated profit today which triggers the 3% of accumilated profit amount, which i have calculated to be around 900trx (which i dont think it will be) i think its based off your deposits, so as your deposits accumilate to 30k trx you will then be able to withdraw the 900trx daily, which after that should net a nice income.
All i can say is it has been working for me and i have so far made my initial investment back.