I was working on a mobile team, the order came down from on-high that google recaptcha was no longer cutting it for verification during user signup and we were switching to Arkose for our captchas, for some reason, no one could tell me why other than "my boss's boss says so".

The Google and Arkose SDKs were fairly different in their implementation and the Arkose SDK needed a lot more tweaks to get working in our code. The entire company spent around a month migrating web, iOS, and Android and then coordinating a simultaneous release. All went well, congratulations all around.

Fast forward to a year later, new order from on-high: we're switching from Arkose to Google Recaptcha because Arkose was too expensive! Rumors were circulating around then that the only reason we had switched to Arkose was that some VC had a buddy on the Arkose board and pushed really hard to get our company signed on, and then immediately left.

I left the company not too long after the migration back to google Recaptcha, but was waiting with baited breath for another order to be given to switch back to Arkose.