Any highlights from the study?

It seems mostly like "lemmy is now moderately liked".

Companies use customer satisfaction as a way to estimate their future potential (like apple was cited as a company with a relatively high customer satisfaction, and indeed it's stock and profits later seemed to surge).

Would be interesting to see something like that for lemmy (you can replace "customer" with "user" for this discussion it's basically the same thing). comparing 1-10 rating of lemmy vs reddit or other platforms (but sample it well, to avoid review bombing), You can compare reddit google play rating with those of jerboa , but that has it own problems (for example a lot of people don't use a mobile client i believe).