Earlier quoted context omitted.
The threshold is very low. https://stackoverflow.com/help/privileges You need 15 points to up vote which means you need to have received 2 up-votes yourself on either a question or answer or have edited 7 questions/answers and had those approved. It's quite easy to hit those numbers. Once you have 1000 points (I think) on any site and you join a new site you get 100 points by default which means you always have those…
The threshold is very low. Well, not low enough for me. After a few attempts to answer some questions early on, I gave up. Read only for me. I don't even remember what the problem was. Why making contributing difficult and consuming easy? I guess it worked for them. Counterintuitive, but nice jackpot.
I don't know why you had a hard time posting. Maybe you're thinking of commenting?
The counter is ExpertsExchange: very difficult to do both.