rsinit, don't worry if you have hours from an earlier version when the bot updates you don't need to pay again.
The ban rate was very low, in the last month in particular where it seems there was no bans at all, but that doesn't mean we should get complacent. Jagex have been able to identify V3 in the past, and since most of us are very rich and have accounts with very high magic and other stats, even a small ban risk is too much. Unfortunately there will be about a week delay with V4, with the release pushed back to 24th. However the goals we are working toward, are being achieved, one at a time, and once V4 is finished it will be so diverse, capable of anything, and working without a pre-plan or script of actions, with each bot being different, the small risk of being caught we have seen in the past, should in theory disappear. It's ambitious, but hopefully the new deadline will be sufficient time to pull it off.
Sorry again for any delay.