It has been already explained, if you invest normally, you add _now_ fpga power and you start earning mined bitcoin. If you wait for ASICs to be ready, or invest an amount with the format x.xxxx1111, you will add ASIC power.
Of course when ASICs will be put into production, all new investments will be made with ASICs.
All accounts will benefit from ASIC infrastructure when it will be operative.
Old deposits won't slow down ASIC revenues by much, since I expect that when ASIC will be installed FPGA hashing power will represent less than 10% of the ASIC hashing power and our infrastructure costs less than 90% of competitors one, making Pyramining the best choice anyway. In the case that after some days (let's say 10) from the ASIC installation deposits won't reach at least 10 times the FPGA hashing power, I will personally invest the difference making deposits to random sponsors in Pyramining, to speed up things.