Pool infrastructure: Relay and Cardano node hosted in Germany at 2 independent locations, on 3 different (climate-neutral operated) Hetzner Cloud Servers: Ubuntu Linux on 4-core CPU, 8 G RAM, 80 GB SSD.
All scalable according to future technical requirements.
Important: all fees are paid out of the total amount of rewards, i.e. they are not charged per delegator! Basically, they are a kind of profit sharing — only if the pool successfully generates blocks and rewards for its delegators, the pool will receive its fees.
With 6.5 million Active Stake (as of CO2P in February 2021), 5 -6 blocks can be expected per epoch. Per block there are about 1000 Ada Rewards in the pool, so app. 5- 6000 Ada. From this 340 A + 127 A = 467 Ada go to the pool operator, so about 4,500 – 5,500 A remain in the pool to be distributed to the delegators. For every 10,000 Ada contributed, that would be 7 – 8 Ada per epoch (every 5 days), or about 560 Ada per year (5.6%).