Vendy Bucks are a good step towards the right direction, But it still isn't good.
I've done the calculations.
Assuming you don't spend a single dime
You need to play 6 matches daily to max out the weekly Coffee mug.
Assuming a player is on SOAF 1-2 and plays exactly the amount to max out each weekly Coffee reward and complete all Jackboxes + they win half of all of their matches.
You get 40 coffee (daily mission + Jackboxes) and you get 15 Coffee If you win half of the daily matches you need (5 per match).
You get 55 coffee daily (best case scenario)
Plus 143 coffee at the end of each week,
(I'm on SOAF 2 so I'm using that as a base)
It means you're getting around 528 Coffee weekly, which translates to one dreadful per month, so it takes 10 months to get ONE Vendy pack, assuming you're not getting ANYTHING from them, gets worse when you realize that even getting a common or uncommon from the pack instantly extends the waiting period one more month.