New ECR rules could be exploited by Bots

This post continues the never-ending debate on the issue of bots in Splinterlands. I am sure the Devs have the good intentions on introducing the changes in the number of battles allowed per day. They have introduced 50 battles max per day and another 50 battles when you pay 250 DEC or 50 DEC per extra battle. This strategy is good as the game introduces another DEC sink on top of other DEC sinks the Devs have introduced recently.

Now how could bot farms exploit this? Take note, the extra battles can also be paid using DEC-B which grants about 20% discount.

So the bot farms could exploit these is again to rent cheap cards, burn the 50 battles and spend DEC-B to buy 50 battles extra and then repeat the processes.