I am very sorry that payouts for the Affiliate Program on Hashing24 have stopped, and it's unclear what the issue is since support is not responding to this question. I like the project itself: the power is provided by Bitfury, which is the main supplier of mining equipment. The selection of power options is limited, but you can still find a suitable option. I chose Hashing24 with a power of 100 GH/s for 19.95 USD — this purchase is permanent, but you have to pay daily maintenance fees for the equipment. Buying them with bitcoins is not profitable due to high transaction fees, so I top up my balance using a MasterCard bank card. Sometimes there are delays in payouts, but they are not critical — up to 2-3 days. Support tries to help and promises to look into the delays, often citing time zone differences since everything is based on Greenwich Mean Time. The minimum withdrawal amount is 0.001 BTC, but you can only withdraw bitcoins, and you can't avoid the fees here.