I got one as well....even though I never subscribed to their old annualized support service. I tried to notify Bandlab by e-mail, but their customer e-mail service is "under construction". Then I found this thread which confirmed my suspicions.

I hope no one erroneously paid this. Something about the whole thing makes me suspect that they will have some trouble getting their money back - plus whatever else the credit card information is used for!!

Got it as well, wrote here without knowing this thread exists.
Now, since the old Cakewalk Store is closed, none of us would be able to pay anything. I also think someone should write to Digital River that they are sending "not so amusing" emails automatically.

Mad_Musicologist
 I also think someone should write to Digital River that they are sending "not so amusing" emails automatically.

Feel free to notify Digital River.

I would definitely contact them (since someone said they kept CC information on file), verify status of your account, and see if that CC info is still stored there. If so, and they will not remove it, I would get a new card for your CC account (if the info they have hasn't already expired). Having a CC on file with a company you do not do business with can be problematic.

I attempted to notify them through their customer service contact email system and pointed them to this thread inviting them to reply/clarify. I say "attempted" because I have not heard back with any type of confirmation yet. Will post back when/if(?) I hear anything from them.

Well futile exercise. Like an episode of "Electric Dreams" where an automated society keeps going on without any people. I couldn't get them to understand the problem until finally one kind android told me she couldn't help me because she is responsible only for the online store - and she sent me a link to the Cakewalk store to resolve the matter. Left-hand meet right-hand.
Sorry folks. (I know it's not helpful here but I am very glad I bought Sonar outright when I did the lifetime update deal and apart from PayPal I have always been very leery of 3rd party e-commerce services.) Without an intervention from "somebody" who set up the original agreement between themselves and "Cakewalk" (the former subsidiary of Gibson), I am guessing these emails are going to go on in perpetuity. Oh INTERNET.

Brando
 finally one kind android told me she couldn't help me because she is responsible only for the online store - and she sent me a link to the Cakewalk store to resolve the 

So it's in her best interest to not report this to her boss; she'd be out of a job.