I posted just before my crash, lol.
People will do some crazy things.
The same is with different ways to enter like telephone, text messaging, snail mail, online, and in magazine postcards. If it says one entry per day then it is one any way you choose unless otherwise stated. I look at rules like math as there is an order in which they do things. First is the limit on quantiites of entries then on types of entries such as "one per envelope", one any method, and no auto entries.
If in doubt then go for the strictest interpretation is my motto. If rules are silent about how many then I consider it one time. Knowing my luck the TOS or some other legal section will state one entry each then I get no entries because I missed that. Recently I saw a site that had very clear rules but had added onto the forms no entries outside the continental US.