Yesterday it was helping an Indian with cancer, today another one and now one who needs  bone  marrow, KETTO maybe TV  has  no control over these  ads?

The only 'posts' asking for donations or assistance action should be the ones supported by ThaiVisa that live in the Community Forums / Charity & Fund Raising - Helping Each Other made primarily by 'Weeboon Happiness Team'.

 

For any other posts the forum rules apply,

 

22) Members are forbidden to ask for or accept donations, gifts or commissions from other members, any charities must contact support for approval before joining to be approved. https://forum.thaivisa.com/contact/

 

If you find posts requesting or directing action that you question you're free to send the mods a message by using the 'Report Post' link in the top right of each post.

 

...though, if what you are seeing is appearing as an actual 'ad' then that's a separate issue that, as you speculate, ThaiVisa would have little to no control over. Many ads are subscriber targeted and you can sometimes change the type being served to you by cleaning your browser cache and history.