From my personal experience I used, I paid about $ 70 a month, and I got a ticket every 2 days with odds 3-4, I was not satisfied, I guessed poorly (more precisely that tipser), out of 15 tickets, the hits were 7. which is very bad for that odds. I lost a lot on that, so I'm interested in your experience?
For me, this kind of method is surely not worth it for a price since it is not going to work all the time this method just comes from their experience in playing the game I think it is better since overall it was just all luck to determine if you win the game. So basically this is useless considering that you pay for it but I would take it if they are going to give it for free.
If it isn't proven to be effective but still returns a good profit then we could say the theory of these betting tips is somehow helpful which is the basis to be considered as worthy to be paid. It is called services that people are free to choose and avail, so it depends if we accept the deal and we try our best to apply the principles to earn.