Reasons:
1. Not everyone is available for war all the time. for example: people go on vacation or two day trip over the weekend where there is no internet.
2. Some people prefer to go war all the time and some maybe want two wars a week only.
3. People get stressed out when being forced to participate or seeing other members can't participate all the time. A game should make players excited not stressed.
Answers to potential questions:
1. Why not leave the clan and come back when available for war?
- It is a hassle to do so, and don't want to stay clanless
- Clanmates developed friendship already. They want to stay, grow, and fight together
How it might be done:
1. only war participants can donate troops to war clan castle and receive war win bonus
2. for all the regular clan castle requests, only war participants can donate to each other.
war-off members can't donate to war-on members, but war-on can to war-off
3. clans be matched based on the base strength of the war participants.