If you are talking about a standard construct 2 game, not multiplayer, then you only have to account for downloads. (bandwidth usage)
Say, your game is 10mb once exported ...
and you are expecting 1000 players per day.
Then it would be safe to say you would require ~300 gigabytes bandwidth usage per month. (10 gigs per day, 30 days for a month.)
And thats just with 1000 players per day.....
I had a premium plan before on my hosting, till one of my games made some success, getting me half a million players in a month ... after a week my hosting put my site offline as I had apparently surpassed the allowed bandwidth usage near three times over.
Upping the plan and paying the bill directly got me online back in 3 hours though.
I now pay like 8 bucks monthly fee for unlimited bandwidth usage.