Morally speaking, this is wrong on many levels:

1. The political parties are acting dishonest, giving the impression that a crowd is supporting them.
2. The rent a crowd company is running a very questionable service.
3. The people actually whoring themselves out to pretend to be supporters, but which only do it for money.

The only good thing I can see is that the people are not forced to show support. As we know, in some countries, you have no choice but to show support when asked..

But who should be surprised, when was politics ever honest?