I want to share a situation I’ve been able to verify step by step, so others don’t fall into the same issue.
Initial problem
I rented hashing power from a user on Mining Rig Rentals who claimed to own their own rig. However, I started experiencing:
- Frequent disconnections
- Unstable hashrate
- Inconsistent performance
This raised suspicion, so I decided to investigate further.
While analyzing traffic directly on my pool, I detected login packets like this:
{"id":1,"method":"login","params":{"login":"MRR","pass":"x","agent":"NiceHash/1.0.0"}}
This clearly shows the mining client identifying itself as coming from NiceHash.
At this point, it was already suspicious, but I wanted to confirm it beyond doubt.
I performed the following test:
- I created an order on NiceHash for RandomX and rented essentially all available hashing power.
- This caused other marketplace orders (including the MRR user) to stop receiving miners.
- At that exact moment, the hashing power from the MRR user dropped significantly / disconnected.
Then:
- I released the NiceHash order (freeing the global hashing power).
- Immediately after, the MRR user started delivering hashing power to my pool again.
- Once again, I detected connections showing a NiceHash user-agent.
- The traffic was routed via MRR’s Germany Stratum. (eu-de04.miningrigrentals.com)
This makes the situation clear:
- The seller is not operating their own rig
- They are reselling hashing power from NiceHash
- Their availability depends directly on NiceHash market conditions
When renting hashing power, the expectation is:
1 - You are renting from a real rig owner
2 - The provider has control over the hardware
3 - Performance is stable and predictable
Instead, this setup introduces:
- Instability (disconnects, fluctuations)
- Lack of control
- Misrepresentation of the service
Please be careful and do not fall for this kind of setup.
I have already reported this to Mining Rig Rentals and Nicehash, although I do not expect any action.
If anyone else has seen similar behavior, it would be useful to compare findings.
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