It is a good site, you have a lot of competition. At least a dozen of these on Show: HN in the last 1 year.
Just an FYI, the search term: "stock photo websites in one place" has over 7000 results.
https://www.google.com/?gws_rd=ssl#q=%22stock+photo+websites...
Which is the tag line here. I personally have about 10 of these bookmarked, and they are all exactly the same, short of different frameworks etc.