I was wondering how it works for vocabulary.com jams sometimes give badges and sometimes don't and what makes it happen

I have one more question what made you find vocabulary.com and what you like about it

Honestly about jams idek how the computer makes a decision I think if both teams have 1000 points then it’ll hand out badges im not sure I wish dighoney or Maryam who have more experience could come share their knowledge

This might sound geeky but one of the things that made me found Vocab.com was me getting bored on Duolingo I grinded on Duolingo to get 100k points in a few weeks. The points are obviously different from vocabulary.com so yea I just made an account

  I lost that first account I made for vocabulary before playing around with my school email and lo and behold I already had a school vocab.con account I have very faint recollection of me ever playing the game but I believe my English teacher had us all play it or something it’s a very faint memory

Jams don't provide any achievements when there are less than 4 people answering at least 3 questions on each team.

I get that from Always Victory's experience (and his other accounts - such as https://www.vocabulary.com/profiles/A1LX4COM3B6U0V).

Is this 100% fact or mostly a guess/mostly correct from testing 

Mostly guessing and testing

After i master 10,000 words and get max for each letter do i lay off and do unmastable words and only master one word daily for the bonus?

billybob its your choice, if you wanna master one word a day, just go to https://www.vocabulary.com/words/a 
(replace a with letter of your choice) and master that one word, put it in a list of yours with other words, but maybe you wanna do something else... like this...

https://streamable.com/l66kd0