The real shadiness is the company behind Sia presold ASIC miners that won’t ship for six months, lol. Those people won’t be getting refunds and their miners will likely never ROI because they are shipping so long after Ant:
https://obelisk.tech/
I don't think they were shady so much as just in over their heads. Not giving refunds is pretty lame though.
Those also mine decree apparently. So while sia might not be profitable. Perhaps decred might still be.
Well technically there is no they yet since they're still vapor. Who knows if they even bother having the Obelisks manufactured since there won't be any meat left on the bone after Bitmain releases additional batches.