I am still looking into the ad manager mod Iused before as well. There was a plugin interaction and things stopped working...
If approaching this from technical perspective.... If you know you want nothing but very simple "ad system", how about simply ditching modules/plugins approach (as it always involves the risk of breaking down things during upgrades/updates), and simply injecting Google AdSense (or Google Tag Manager) code into theme-file(s). It is somewhat risk-free and easy/quick operation (basically copy-paste).
If you decide to go with Google Adsense, then do acknowledge that under AdSense's management there is an option to disable "Standard sensitive ad categories" - which pretty much filters out everything people consider "junky" (astrology, body modifications, consumer loans, dating, downloads, gaming, get rich schemes, weight loss etc). By default ads from these categories are allowed.
...and the income from ads went down significantly--actually that is an understatement. It was never a lot, but it paid ofr the running of the sites and other expenses and, back then my student loan which (YAY) are finally paid off.
Right now I am on fire to do some things with the sites and am needing some income to finance what I want to do.
I know your pain (been there, done that etc)... Have you considered other means of website monetization? Basically the key to longterm success is all about adding number of tiny sources of revenue that work.
Besides Google Adsense you might want to experiment with some affeliate programs. For example legal advice seems to be one area that audince here uses a lot - you might want to check yout affeliate program such as RocketLawyer or LegalZoom (paying 15-30% commission of each sales). And many of us here do buy (marriage, psychology etc) books from Amazon (their Amazon Associates Program pays 1-10% of each purchase)... Whether you provide something like a "list of recommended books"(changing monthly)" or "use this link when buying anything from Amazon" or "seek legal advice from here" are all ok options (and considering you have got global audience, with heavy focus on US, Canada and UK - you could and should localize the offering).
... one of which is with email sending.
Let me guess... you had to switch server / IP-address in beginning of year? So basically your reputation/sender score etc. went to kingdom come and some/lot of the mail sent out bounces back? It's a touch sitch with no quick & easy way out - which is why many people opt-in with external services like Mailchimp (full mailing system) or SendGrid (basically just a mailserver you connect with your server). Of course both of the above options would be yet another cost
Just like everything else, these things need to worked through one at a time, using somewhat systematic/mindful approach. Possibly the first thing could/should be finding out how many users are having negative experience with ads? And why? Is it because of sensitive ad contents, bad ad location or ads slowing load times. Possibly having a poll or two on topic would be a good idea.... On the positive side, the ads are now running and hopefully bringing you some much required funds to keep the systems up and running. So situation is more positive than negative IMHO.
Alvin.
At time of BD.... Me: 43, XW: 41
Kids: G19,G18,G14,G12,S5
Together - 20½ Years, Married 19 Years
BD ("I don't love you"): Feb 2019,
BD2 ("I don't want to fix this marriage."), Mar 2020
D filed May 2020, D finalized Dec 2020
I have moved on, and am in new relationship.
Lessons from Stoicism and REBT helped me to exit the chaos zone and become a better person.
"Happiness and freedom begin with a clear understanding of one principle: Some things are within our control, and some things are not. - Epictetus"