Wanted to subscribe to SLL at RM38 today, and experienced the same thing. Only have RM1 per day option under "validity". 

Searched lyn and saw this thread. Indeed my balance was < rm108 so I didn't see this option. Memang silly to do away with the option based on credit balance.

Then saw an earlier post here asking to check at BOS, and indeed it's there. Phew...