Honesty, I got bored on Gaia mostly, the friends I had left and moved on, the part of the community I was most active in faded away (the old zOMG fam) so I had less reason to be on and less reason to spend. I went inactive on the site for over a year in 2015-2016. Back when I used to play all time time I would spend a least 25 bucks a month if not more, though I was never a whale. I did buy one recolor ticket right before the old management departed, but after all that I slowly left Gaia.
And then my father died suddenly in 2016,.
And Gaia was an old familiar friend I could come back to.
I still don't spend much, the style of items isn't quite to my taste most days, but I do have the 5 dollar sub and I occasionally buy more. I like Gaia, I'm fond of it, but that's honestly due to nostalgia more than anything else these days.