Conveniently, it looks like the decay has been implemented by simply adding it on as a "start of week" undermining counter, so it's really easy to tell how much there has been.
The decay is at different rates for different system types.
EDIT 20 July: those initial estimates seem slightly off. Exploited seems to be closer to 2/23 but that's still slightly too low and Fortified seems very marginally above 4/24th as well.
The decay is at different rates for different system types.
- Exploited systems lose 2/24th (see edit) of their strength above 25% so the maximum loss is just over 20,000 CP
- Fortified systems lose 4/24th (see edit) of their strength above 25% so the maximum loss is just over 80,000 CP
- Stronghold systems lose 5/24th of their strength above 25% (after the final cap to 2 million CP is applied) so the maximum loss is just over 150,000 CP
EDIT 20 July: those initial estimates seem slightly off. Exploited seems to be closer to 2/23 but that's still slightly too low and Fortified seems very marginally above 4/24th as well.
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