where is the advantage in ASIC deposits after November OR if you deposit less than 10BTC
For small amounts (less than a few BTC) nothing changes much. For higher amounts, you will add a lot more hashing power if you deposit for ASICs than depositing in current technology. This may change the speed at which you will get your rewards. It will start later, but it will end sooner.
If I deposit not for ASICs - my "investment" starts immediately - and as soon as ASICs arrive at pyramining - I benefit, too.
If I deposit for ASICs (after November or less than 10btc) - I have to wait untill ASICs arrive (am I right?) at pyramining and the "investment" starts only then.
True, and as I stated a few rows above, for small amounts there will be not much difference and it's possible to invest with FPGAs, when ASICs will be deployed, you will benefit too. But if you are going to invest, let's say 100 BTC, it's better to wait depositing or depositing using ASICs. The current promotion (on which I will deposit 50% of the deposited amount, if > 10BTC) makes it worth to invest now instead to wait for ASICs to be ready.
Only want to know if it makes sense adding some BTC after november for ASICs
After November, the only meaning you have to invest in ASIC instead of waiting for them to be ready is that deposits will be fulfilled in "first come, first served". If there will be much more deposits than available hardware (first batch), only the first ones will become active, others will have to wait for further batches.
Hope it's clear now... if you have any other question, just ask.