Can't conclude anything. I guess it comes back to how lucky you are.
At 15th feb there are also many others individual who use cheat and didn't get banned.
But I will list how I am doing to play safely, At least to reduce the chance of getting banned
1. Only using cheat at night time (around 1Am-5Am JST (just match it with your own time))
2. Using unlimited skill, dumb enemy only after first turn
3. Quickly turn off the cheat one turn before battle ended
4. Use VPN to login when you are going to use cheat
5. Don't link account
6. Etc (any suggestion would be helpful, I am still testing how it goes at least let's see the result in a week)
Guess what if used correctly your character can go to lvl 70 only in 2 days (also I got lucky my team full SSR now)