The top 60 update is not what cause profitability to drop down. It can be. Before the update they was giving 400000 Mrai per day, now they are giving 17000 every hour and that is 408000 Mrai, so that is 8000 Mrai more per day. That leads to conclusion that if the number of participants and claims stay the same Mrai reward per claim should be bigger, but since the update it looks like the service become more popular and attracted more participants and motivated them to make more claims, so result is: lower Mrai reward per claim.

Now, we are only left to hope that price of Mrai goes more up, so we can earn as we used to.