Evija, there are still ways to get creative or thousands of drops coming daily.
If .com is taken, just use next best .com (or better .com, sometimes).
In addition, .net, .org renewals are considerably higher (up to 40-50%)
So if you have good quality kw+kw.com portfolio with 200 domains, you can expect 2-4 sales a year with renewal cost of around $1,700
With .net, .org, you would be lucky to sell 1 and your costs could be around $2,500/yr and higher.