They are letting too many players play under a second name why they do it is beyond me
If you are sure this happening send CS a message with names and your proof they are cheating. Cheers
In my opinion it's likely many are not cheating. If you go to your account on a mobile device you will see a red "Delete my Account" button. If you press that then you no longer have an account. Now you are free to give the game another try with a new name, hack tees, 10ft gimmes, putt preview (?) etc.
Wgt say Apple and Android insisted they add it and with the threat of not being in these app stores it's understandable that they did. There is however, in my opinion, a lot they have done that has made the situation worse. Admittedly some of it I can see; (how easy it is to get XP and level up, the good equipment available at low levels, for example) while things like the putt stuff is anecdotal.
It also used to be that people that have had an account, deleted it and then opened another, were not allowed to enter competitions with a prize until they reached their previous tier. I have not heard of a single instance of this being the case with the people that have recently had an account, deleted it and then opened another. There is no button for PC players, unless they also have the game on a mobile device.
If you see more than one active account, that you know belong to the same person, then they are cheating :-)