Update; upon logging in today my account was open again for surveys. I completed the fifth survey and was able to cash out. They do pay, however, I noticed the currency is in AUD, Australian dollars. I chose the $5 PayPal cash-out but after currency conversion, I only wound up with $3.27 in my account.
I attached screenshots for the proof of payment (the original message and the actual amount I received in PayPal).
So... I'm not sure if I will stick with this survey site. Perhaps I'll try one more time and pick a reward from the gift card options to see if they pay out the full $5.00. Maybe it's because I chose PayPal.