Here's the link to the data: http://www.themanadrain.com/topic/744/vintage-championships-2016-decklists-and-metagame-analysis

62/343 were budget

41/62 were colorless eldrazi

I actually just messaged @ChubbyRain last week about this. I attended EW 2016 as my first legacy event and plan to attend this year playing in my first vintage event. I found Matt's data from last year with all the decks (I can try to find and link it) But you can filter which were "budget". It appeared the vast majority of the budget decks were in fact JacoDrazi, but I distinctly remember several others including a maverick/hatebears-esque list and a mono red prison. They were only an handful of budget lists compared to the powered list though to answer your initial question.

Here's the link to the data: http://www.themanadrain.com/topic/744/vintage-championships-2016-decklists-and-metagame-analysis

62/343 were budget

41/62 were colorless eldrazi

I actually just messaged @ChubbyRain last week about this. I attended EW 2016 as my first legacy event and plan to attend this year playing in my first vintage event. I found Matt's data from last year with all the decks (I can try to find and link it) But you can filter which were "budget". It appeared the vast majority of the budget decks were in fact JacoDrazi, but I distinctly remember several others including a maverick/hatebears-esque list and a mono red prison. They were only an handful of budget lists compared to the powered list though to answer your initial question.