How has the site 500px been for you lately?
Do you like their new Groups functionality?
They want your feedback, follow the link in their tweet to the questionnaire:
Would you like to speak with us about your thoughts and opinions on @500px? Fill out this questionnaire https://t.co/yLWY9KpSasSee you there! https://500px.com/JeffSullivan
— 500px Help (@500px_Help) October 8, 2014