[quote:orm164mn]ATM I hope it makes it on Steam (wishful thinking I know!), and Humble Bundle Store..
You've got a better game than some that have got the Greenlight and you won't be the first Construct 2 game - there are already 5 that have gone through Greenlight and been released (Epic Space, Angvik, Our Darker Purpose, 8BitBoy, Dreaming Sarah) and 4 others that have been greenlit but not released yet (Airscape, Cosmochoria, Reven, Once upon an Apocalypse) plus the Construct Classic game Tower Climb has been greenlit too.
[quote:orm164mn]Honestly have no idea about these other stores, is Desura worth it?
I worked/work on a non-Construct 2 game that was one of the first greenlit games released on Steam. We sold maybe 15,000 copies through other stores (including less than 2,000 through Desura) in the year before releasing on Steam, and then sold that many on Steam during the first week as a featured game and then 10,000 to 15,000 copies a time in 3 big sales.
When not featured on Steam store sales dropped, but they were still much higher than pre-Steam sales.
It's always worth it to go in any sale or promotion Steam offer even at a huge discount and don't be afraid to ask to go in one if not offered one.
Being featured is obviously the best. Midweek madness, Spotlight and weekend deals are pretty good but hard to get in. Weeklong sales, daily deals and flash sales are easier to get but not as good. Seasonal sales like the Steam Summer Sale are the easiest to get into and are ok for a little exposure but you don't get as many sales as the others because of all the competition.
A lot of games are vying for the best sales spots so it helps if you can offer something new. We got a Spotlight and Midweek madness sale when offered a small free expansion and additional features.