"Why does this pipsqueak operation want usernames and logins....."
You'll have to ask them. After years of free service it became their policy some time last year.
And, there's nothing "pipsqueak" about it. Professional world wide coverage with excellent charts.
The only thing "pipsqueak" is the person with the arrogant attitude that resorts to derogatory comments about the motives of a service he knows nothing about.