No, the little bonus that we receive when Watford wins, will not make a huge impact on my life... because all of that goes back to Stake. I am concerned that good money is wasted on poor performance and that is not good marketing. Just to be fair, I know Stake did not anticipate that Watford would perform this bad, but they should not sign long-term contracts with these teams.
I believe that the more money invested into marketing, will take away more money from the players. The players must pay in some way to sponsor those teams and I hope this is not done by decreasing the RTP for the games that are played.

Also, that money could have been spend on improving the UK casino. (Have you seen the low quality of the UK casino) ?
This is very flawed thinking. They give bonuses because long term they believe they are good investments.
If they thought long term they would make more money by decreasing the RTP, they would decrease the RTP. Their marketing strategy has nothing to do with this.
The money they spend in advertising has nothing to do with the RTP or bonus amount.
You are a revenue generator for Stake, not an investor.