"They should do this thing in order to continue to succeed."

"Why?"

"Because if they don't they'll fail."

"Now you're arguing for a monopoly."

You can't possibly be arguing in good faith at this point.

You have to ignore the "They will have competition." to make your own bad faith argument.

PS: And then miss our further interaction

As a consumer, I don't want to go through the effort of finding the next Etsy. I want to be lazy and have the current Etsy be good.

Whatever comes next will be small. They will lack some of the things I want for many years.

As a lazy person I want sixpack abs, without putting in the effort.

Also - monopolies are never good.

If shouting at the sky had a chance to convince God to endow me with abs, I would make it a daily practice.

Etsy does listen to it's consumers, at least some times. The cost of complaining here is commensurate with the potential benefit.