Ahhhh that's totally a cell players bane right there buddy. I literally cannot tell you how many times I have fat fingered the letter below the number on my little cell keyboard.

When I go to tech I'll type 1q198 instead of 11198 and tech literally one tech point. I'll go to build 250 buildings and type 2t0 and get 2. This happens on spy ops and war room and everything. I cant even tell you how much it happens to me but I'd wager between FFA, 1a and team it's probably 1 time per day. Selling something under minimum because letters dont cause an error. Theres so many places you can make that exact mistake that 100% cell players like myself have nightmares about it.

I think filtering out min sales is fine. I dont have an issue with it or against it. But not being able to put letters or spaces in number fields would be the most life changing thing since....well....not sending people FA with nothing in it anymore lol.