Sorry for questioning the legitimacy of your revenue claim, but according to Similarweb your site gets less than 5000 visitors a month. [1] Alexa's estimates seem similar, putting the global rank at 6.5 mio. [2] Wouldn't you need millions of yearly visitors for that kind of revenue? I know those traffic estimations aren't perfect, but this seems off by a lot. Am i missing something?
I block all bots and crawlers except Googlebot and Bingbot (the others bring no users but can hit the servers hard), so I'd treat Alexa etc with a pinch of salt.
Nonetheless, the figures I gave are for 2016. Since then, there has indeed been a fall in all numbers, largely because a site like this will always be overly reliant on Google and, for whatever reason, Google favours the site less this year than it did the year before.
At its peak, the site had approximately 53,000 daily visitors.
I listen to the Mixergy podcast and Andrew always quotes Similarweb to the interviewees. It always goes "According to Similarweb you get 90% of your traffic from X site?" And the interviewee is usually like "I've never heard of that site." I don't really trust the data coming out of similarweb.
[1] https://www.similarweb.com/website/storeslider.com [2] http://www.alexa.com/siteinfo/storeslider.com