In my case it's due to Soylent + procrastination. Always wanted to try it but it seemed cumbersome (1 bag / day + oil stuff) and hard to get in Europe, so I googled around from time to time (the procrastination part, it was somewhere in the back of my head).
Some alternatives looked a bit goofy (Joylent), impractical (MANA, due to the huge bag + oil) and so I somehow landed at Jake where the concept of 1 bag = 1 meal and Jake Light made me order right away.
For me it's the solution to prevent myself from eating junk, especially at work when a lot of people decide to go for Pizza / Burger or time is limited and people "grab a sandwich". Not only do I stay way more productive, it's also stabilizing my weight that way.