Buying materials / data from tech brokers
This could be used as a credit sink, and would cost more than doing missions. At the moment for each grade 5 material / data we get as a mission reward, the credit reward is reduced by 500.000 credits. Therefore, buying from the tech broker would have a cost of at least 3x the cost of a mission reward.
There could also be a weekly limit on how much you could spend in getting materials / data this way.
This could be used as a credit sink, and would cost more than doing missions. At the moment for each grade 5 material / data we get as a mission reward, the credit reward is reduced by 500.000 credits. Therefore, buying from the tech broker would have a cost of at least 3x the cost of a mission reward.
There could also be a weekly limit on how much you could spend in getting materials / data this way.