The pool filling as avatar gain exp even they already max level. Meaning everytime avatar doing something to gain exp, they contribute bonus to the pool.

For now, the pool draining require purely exp. In future, added new effect may drain certain Alternative Currency like Relic of the Kingdom of Elements, or Anniversary Coin, but never require Gold or Crystal.

Several note about the pool:

• The contribute rate to the pool are not always the same. Higher loyalty member will contribute more than low loyalty. Tarbard also affect the rate as well.
• If guild progression has not enabled, the pool will not start.
• Many beneficial effect scale between guild level and target avatar. So higher guild level meaning better. This also boost newbie player easier than old veteran.
• System does log the draining from the pool but not the contribution.
• Exp contribution calculated before bonus exp from beneficial effect but after party exp bonus. Player party together not only increase their exp gain but also contribute more to the pool.
• Certain special exp will not contribute to the pool. For example, the exp gained directly from the pool.

Surely there is good chance that some player will selling the effect, for carry service example. Infinium does not forbidden those trading, and we have confident in our management skill that we will keep that in balance.
A small hint that player buy those service require leave guild, and their loyalty drop. As this value drop, the Potential Point mechanic tax heavily on them. So it's their choice.

We listen to community demand and added new effect to the pool as it possible and acceptable. For example, Water of Death will not be added as it is collide directly with Replica Service. Costume and Gold, and other thirsty item like Almagam will never be added.