So is it a scam? Maybe.
Is it inconsistent? Definitely.
Should you continue using it? Probably not. Being inconsistent is just as bad as intentionally not paying out.
I cashed out 100k last week and never received it. I continued claiming and cashed out the the next 152k Monday and received payment in a few hours. So in my eyes its not a scam. I recommend cashing out at the minimum just in case the payment doesn't go through.
i beg you pardon but he is intentionally not paying out.
Proof
https://blockchain.info/address/12DMcLu2xDJEJKJovjwXpWiEdbBACYRWsX
Summary
Address 12DMcLu2xDJEJKJovjwXpWiEdbBACYRWsX
Hash 160 0d4e52373885f59a7a17dadeef6a9f90ea8eb782
Tools Taint Analysis - Related Tags - Unspent Outputs
Transactions
No. Transactions 178
Total Received 9.04712944 BTC
Final Balance 5.63401744 BTC