About the Ads on the forum, I want to say the kind of ads you have are not useful to us because we build our own cells.
consider some useful adds for people like us... for example
Ads for Books on Electronics and Physics and Chemistry
Ads for Electronic Test Equipment (scopes, multimeter, frequency generators, power supplies)
Ads for electronic parts and components
Ads for materials like SS and delrin and acrylic
Ads for copper wire maybe
If you had Ads like that, I would be checking them out all the time, because that is what I spend my money on. Ask google to set you up with those, and I am sure you will have a lot more members using them. Maybe some other members have some ideas for Ads they would click on.