Please allow me to add keywords to rank tracker in 500 word increments-and maybe not DOUBLE the price of our whole subscription for simply adding 5,000 keywords-what a rip off-I pay $399/month for all kinds of services including 500 keywords, and you want to double that..I was willing to upgrade to purchase another 1,000 keywords to add to my account, but because I am at a 5,000 limit already with $399/month prescription plan you will only allow me to upgrade to another 5,000 keywords. If I could upgrade 500 or 1,000 at a time you would get more money from me, but since you won't let me I am forced to not use your ranking tool or cut back on other projects-bad for your business and mine. You lose extra revenue, and I cannot use your service the way I need.