I'll admit to being a "regular" buyer and voted accordingly. I don't buy every draw, I only buy one ticket personally, and I always am in the office pool which has different buy ins depending on who organized it.
But I am sure I spend maybe $100/year on the entertainment value.
For a year or two I had a "subscription" from the state of MA ($90 for 104 $1 draws IIRC) where I picked the numbers, but lost that option when I moved out of state.
On a similar note, maybe once every 5 years I'll find myself in a casino and I'll gamble $250 or so, mostly blackjack. I think I prefer the lotto, because even though the odds are an almost sure loser, the reward is astronomical enough to spark the imagination. With blackjack, while it has the joys of a game, even if I went on a hot streak it wouldn't change a thing in my lifestyle. While the slots have the aspirational rewards I like, the mechanics of it make me feel like a pure sucker with each pull of the lever.