Classic case of high value to end users but low revenue, because ease of use doesnt bring money.

Gained a huge user base quickly then sold to Google who wanted it apparently to help people toy around in Google earth, then they did little with it and eventually sold to Trimble, mostly a surveying company, who similarly had hopes it would help expand their users and market reach, which it hasnt really its mostly still evades commercial revenues and continues to be used by the same kind of users as originally