Kiva has always seemed to have people who aren't fans of the model and has had problems in the past[0]. Lately it's been more of a feeling, the messaging has a corporate spin to it that makes it harder to give them the benefit of the doubt. A specific thing is they have done recently made the page where you withdraw funds harder to use, and it seems like they have stopped sending emails to me when I have funds available in my account.
Kiva sends me emails weekly, asking me to relend my funds as they get paid back. So the email is not the problem. In fact, I get emails from them every few days.
The thing that I wonder about Kiva is the "donate to Kiva" part. If you lend, and re-lend as money is paid back, and re-lend again, with the default "donate to Kiva" settings... eventually, after a couple of years, 100% of your money ends up in Kiva's hands and not a poor person.
But that said, I never expected to withdraw my money back.
[0]https://blog.givewell.org/2009/11/16/not-our-last-words-on-t...