Here at Fund a Friend we don't charge a subscription fee, fees are only applied to your campaign donations. When receiving a donation there is a Platform fee of 5% and a Payment Processing fee of 2.9% + £0.30 per transaction.
If someone donates £100 to your campaign, the Fund a Friend Platform Fee is £5.00 and the Processing Fee is £2.90 + £0.30, which means you would receive a total of £91.80.