Ion Hazzikostas
Season 2 sparks are one every two weeks, starting with the start of this season, and that will continue forever. There isn't the "you hit your cap, and now good luck winning the lottery getting extra ones," it's just one every two weeks.
As far as Season 1 Sparks go, the quest to earn the original five still exists, but no more Bottled Essences will drop past that. Season 1 Sparks can still be used to craft Season 1 gear, which you can then recraft to Season 2, or you can just make Season 2 gear straight up.
It's one every two weeks. You get a half every week, so you'll get your
first half next week, your
second half the first week of Season 2.