Actually I advise everyone to just buy the currency itself instead of a miner as the ROI is mostly worse when buying a miner :-)
Decred has a splendid team, I have never had any doubt about them.
It's true for now.
Investing money directly into favorite coins are much better than buying rigs and mining to get coins.
Most of coins are un-profitable for miners ATM.
In my 5 years in crypto I have only had real success mining one coin, PIRATE, just the last month, every other time if I worked out my ROI after a decent hourly rate for my time it was a loss. Mining is only profitable if you have cheap electricity, own the hardware already, and enjoy the time spent as a recreation activity, otherwise in 99% of cases it's better to buy.