I would be more worried about this part, when you say "miners" do you actually mean buying the real equipment (ASIC, GPUs, mining rigs,...) delivered to you where you install at home and then run to mine these coins or do you mean some website you have signed up with (aka a cloud mining) where you pay them some money and they promise you they have actual hashrate and are mining these coins?
Since you are mentioning a bunch of different altcoins with different algorithms and bitcoin it seems like it is the later in which case you may be getting scammed since cloud mining services are Ponzi schemes.