I somewhat agree, yet wouldn't a healthy extension ecosystem (excellent term, btw) attract more users to Chrome and in turn keep users more entwined in the larger Google ecosystem? I guess there is a cost/benefit analysis done. They put just enough effort into it to get the return or results they want. The little guys like OP (who arguably make the best content because it's open source and not full of trackers or other junk) just get stepped on along the way.