I am a high level player who recently started going back to the Market to work. I don't need the xp, coins or even the crops. I have more than enough of all those things. I go back for these reasons:
1. I am tired and bored from sitting on my farm clicking away at my facilities when I am not sowing or harvesting.
2. I have all these cool super tools sitting idle on my farm when I am not using them. Putting them to work is a very good thing.
3. I go for the people who have a hard time getting help in the Market. Everyone wants to plow, and very few will harvest flowers, fish, or chop or do trees. I do all those jobs for very grateful farmers. I haven't forgotten how I use to have to beg to get help with my two farms full of flowers. So I get the jobs that nobody else wants. All I do is add (All Tools) to my name. I say nothing. I just stand there, and I don't have hands to handle all the requests from very grateful farmers.
4. I see my super tools as toys, and I love to play with them. So I do have a lot of fun working for others with them. They have really put the fun back into my game!
It is my humble opinion that some players are going to be dissatisfied no matter what we do. That's their game! We just need to keep on moving and have some fun while we are at it

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Peace and Love.