What are some alternatives?
When comparing MultiMiner and Argo Mining, you can also consider the following products
NiceHash - Bitcoin Cloud Mining
2Miners - Modern cryptocurrency mining pool for GPU mining rigs
MinerGate - Start mining effectively with your computer or smartphone. Squeeze the most profit automining coins with the highest rates.
Donate Your Tab - Mine Crypto in your browser to help people in need
EOBot - "Cloud" mining and Bitcoin mining