Interesting thought. On the surface, the model - you invest in "something" which gives you a "share" of the mining revenue of a "really existing mining operation", with the chance that you're investing in a ponzi, looks indeed a bit similar.
But I think the real problem why cloud mining failed is that there were so many "providers" which turned out to be outright scams and that it is so difficult to prove if they deliver what they promise, as they were basically unregulated. I wonder if there is any way to technically prove that you're participating in a real mining process when you don't have real access to a Bitcoin node (or mining software) but only to a web interface. Even if this interface looks and feels like a Bitcoin node interface everything could be faked.
In the case of publicly listed mining companies, while this danger (the company not sharing the "real" numbers) still exists, I think it is various orders of magnitude lower due to all the investor protection measures regulated public companies have to comply with, and the consequences they face when they provide fake info.
The passage marked in yellow about Riot's share dilution looks of course bad for shareholders, but this information is completely public, so everybody considering buying Riot shares knows about it if they do a little bit of research. If Riot wants to continue its business in a sustainable way, they shouldn't do that too often or their share will drop to unsustainable levels (and this is valid for all public companies, not only for miners). I guess their move could be related to the halving this year, trying to get a little bit more margin for that event, but it can't be sustained in time. These shorts should be seen as a warning for Riot to not abuse that method.
And in general I think "publicly traded" is not a bad model for miners per se. You could argue that miners' cashflows are in some manner "capped" due to the limited block reward, but as an individual company you can grow your market share and thus their share can grow, and once having stabilized it can switch to a dividend-based model. Riot had about 5% market share in 2023 (it produced 6600 BTC from the 328000 available ones), so it still has room to grow, and thus a share dilution can sometimes be justified.
I am not speculating about this on the basis that certain cloudmining operations were scams. I was only speculating it from the basis that if each share on a cloudmining company is sustainably profitable for many years or not, considering difficulty increases in bitcoin mining. I reckon it would be very much difficult for miners to maintain profitability without upgrading and increasing their equipment and this certainly is only possible if they increase the investment spent on their operation.
Cloudmining companies increase the investment spent by issuing new shares. Bitcoin mining companies listed in the stock market also increase the investment spent by issuing new shares hehehehe.
Also, on these types of investment, the investors should count their investments in bitcoin spent on these shares and they should breakeven in bitcoin.