Sure. And don't sweat the comments about "it doesn't do anything new blah blah."

I built an eBay feedback reminder (that's had over 15,000 paying users over the course of its life).

Here's the thing: eBay already sends feedback reminders and people pay to use mine anyway because of some minor differences (and then there are customers who don't know eBay sends feedback reminders).

Pretty much every nay say anyone who hasn't succeeded in business could give you is total fluff.