So they are selling Sha256 hashrate of 1gh/s for 0.025 USD, so that is $25 per TH , but they don't tell you for how long that is, if it's for 24h then you lose 99% of that amount anyway, they didn't even bother with putting the basic details of their "contracts", very obvious scam.
Anyway, you just learned a lesson for $50, be glad you didn't "invest" more.
Thanks for sharing your experience.
Don't rely on Trustpilot too. Reviews are mostly fake as it's easy to do.
Trustpilot is bullshit, to place a negative review you need to provide a ton of documents to prove your claims, to make a positive review it's as easy as it gets, the way I use Trustpilot is by simply focusing on the negative reviews because they are mostly valid, and I pay little to no attention to the positive once.
OP, while this is mining related, it still needs to be moved to scam accusation.