Does eRewards cancel your account if you have not done a survey for several months?

I went to my husband's account intend to do a small transfer to Radisson so to generate an activity before the 24 months expiration date comes up in Oct. Once logged in, the site said You have canceled the account... Well I know this definitely not from him or me. His account balance is still there, and even allow the transfer to process but simply no survey. Filled out the online email inquiry to request reactivate account as well as re-do his profile.

His last survey was done in Mid May. I notice the last surveys came in Mid June, then stopped.

I saw there were others who had gotten the "You have canceled your account" message, on active accounts, i.e. both surveys and redemption. His account is inactive - hardly redeemed anything other than generate activities. Last redemption was in Feb to AS. Before that was in Jan to BA.

Unlike others, his account balance is intact and the redemption is processed. Very strange.

Went ahead to redeem $100 to AS account. It went right thru.

Tried to make a 3rd redemption of tonight, $50 to UA - it said the account has reached the redemption limit.

How many redemption one could make within a day / a week / a month?

Tonight he redeemed a $25 Radisson and a $100 AS, then it hit the limit.

AS is instant. Anybody knows how long it takes Radisson to post?

Thanks.