An official raffle could take place via a chatbot. In order not to exploit the system existing Bytes would have to be linked again. The more Bytes are linked, the more lots will be allocated. As a price, at least a relevant amount of min. 10K or better 25K USD should be distributed. I will not raise any acquaintances for a $ 100 profit.
There is already a lottery on Byteball https://lucky.byte-ball.com/
So, I am not sure why there would need to be an official one because that would not go with the idea of "fair distribution".
I have played a lot with the existing chatbots and come across the problem of the unit "Byte". Constantly you have to switch between MB, GB and Byte. That is impractical. It sucks. Even if you put your wallet on a specific unit, then the chatbot may use another unit and you have to convert again. Bitcoin also has its pennies with Satoshis. We also need these byteball pennies for byteball. The best way to do this is to give it a new name to avoid confusion with other technical units (such as RAM).
I am not aware any bots where you would need to constantly switch between all 4 unit sizes, usually it is MB, in some other cases it is GB. Also, with bots, you actually don't need ever switch between unit sizes because wallet does that for you by sending a payment link in exact value it needs, so if the bot asks you GB or just Bytes then it doesn't matter if your wallet is set to MB. Only time when you need to switch between unit sizes is when you are doing the payment manually and somebody asked you amount in units that you wallet is not set.
So, it is little bit confusing, you say they suck, but at the same time you suggest that there indeed needs to be more that one unit size, only difference is that you suggest that there should be 2? Isn't Gigabyte and megabyte understandably bigger than just bytes? What confusion is there with RAM (that is the whole idea of bytes)? It would be great if the users even know anything about RAM because then GB and MB already makes lot more sense to them than bitcoins and satoshis. How should beginners know, which is bigger? Coins are usually the most valueless amounts in fiat and fiat usually has the notable persons on the most valuable paper notes, yet in this case, it is opposite. https://en.wikipedia.org/wiki/It%27s_All_About_the_Benjamins