By the nature of the mining, each miner is pretty much on its own. There is no immediate incentive for them to open up their mining pool to others. However, I expect to see competitors soon (now I see about 2 or 3); It’s not too complicated if you are a decent programmer to create a mining pool. At that point, a mining pool that lets individuals to join would get a better chance.
The mining pool wasn’t created by the Creditcoin Foundation or Gluwa. It was built by independent miners. I found it out by looking at the mined blocks and getting contacted by the miner.
Technically, a mining pool was always possible. It was just not built.
Regarding the relationship between the mining pool and the development of the Creditcoin Network, it is definitely positive. Higher difficulty makes the blockchain more stable and secure. That does not increase the TPS or change the usages schedule directly, but it definitely helps.