I think dappradar understand very little how things work, possible less than you, so it's very hard to discuss things, possible they even asked for money to actually do something properly.

It's mostly fake. Even Splinterlands, dappradar don't check if operation is real, they just count them(operations are fre on hive, so it's huge advantage in stats), you can fake whole thing, I did it before, made few "better" days for splinterlands, cause I can :)
(besides checking these confirmations on splinterlands api, makes blockchain side of the deal completely obsolete, and just funny, could just ask splinterlands api for number of transactions in last 24h and ignore blockchain)

If there is no verification for splinterlands, Engine is pure magic for them, I think they prefer us to create fake data,

It's even hard to discuss these things with above as starting point. You need to teach them about hive blockchain, verification, engine as they have only simplest ever solution to count transactions(on free blockchain)

Most of the applications prefer to not spam blockchain they use. You can approach this statistics in reverse way... Less is better, especially if you count % of completely unnecessary transaction that are forced into blockchain, there are even applications that waste users rc broadcasting actions for stats, when everything happens on database/api level (beer making game, where you click action, everything happening in game then keychain ask you to send symbolic action so there is not real statistical record, you can skip broadcasting)

You probably already realized that instead of writing this post you could just broadcast 10k free transactions to improve stats for your favorite game. You can also add them there, actually you can add fake apps(at the end it's just custom_json id), then broadcast few k transactions for it and make it second app on hive. Would be funny if it's possible to make double count on splinterlands transactions for another app.
So you don't really need devs, everyone can do stats manipulation. Am personally not interested in playing this game for my apps, tho anyone can fake stats on any app.

This blockchain stats business is weird. Don't you think that some blockchains and application will practice stats manipulation? For me answer is very clear, absolutely yes. Especially blockchains where transactions are free