I'm with you. It especially bugs the hell out of me to see this attitude coming from other software developers. I've never complained about having to pay for someone else's software, because I really hope other people will see fit to not complain and buy mine. This is our livelihood here. We can't all be independently wealthy open-source developers.
Read the cogent comments more closely. Folks aren't concerned about the cost of the software. They're concerned about the built-in killswitch. Most folks in the thread will pay 2->4x more than they are paying now for a perpetual license to a particular version of the software. They're also more than happy to pay that same amount for future versions of the software, but on a schedule that they dictate.
If you're considering making a tool a critical part of how you do business, you need to be able to rely on it forever.
If you rent that tool -and don't have a rock-solid contract with stiff penalties- the lessor may chose to suddenly discontinue, or dramatically raise the price of that tool. Or their company may suddenly go under, taking access to all of your rented software with it. In any of those situations, you'll be left scrambling to find a replacement for something that once was a critical part of your business.