Twitter ads are widely seen as ineffective versus other advertising channels (to verify for yourself, you can check r/PPC, r/marketing, and other subreddits via a site:reddit.com Google search). Results are likely lower due to poorer analytics, which translates to your ads not appearing to the most relevant people.
Google Search Ads and Facebook/Instagram ads are seen as more effective in comparison (results are likely higher as Facebook/Meta are relatively better at analytics, so advertisements appear to more relevant people).
In addition, $50 is not a lot to spend on an ad campaign. It generally takes a higher number of advertisement views by the same person (preferably across different websites and channels) to produce an intended result.
It depends on what you’re selling, but roughly $500 per month is seen as solid on the r/PPC forum (that is, no major objections when brought up), with $100 a month as not outrageous (especially as a starting point). My assumption is that the forum is credible and not astroturfed (which seems fairly reasonable from intuition).
I wish there were a scientific study to lean on as a more credible source. I personally don’t have direct experience for budgets smaller than $1,000 a month, back when I did work with some non-profits.
Roughly $100 a month sounds plausibly viable at the lowest uncomfortable end with skill, but you also need that skill in graphic design to make an effective ad, persuasive writing, and a good idea of how to target the right audience. That perspective also costs time to learn from books and/or money if outsourced.
Google Search Ads and Facebook/Instagram ads are seen as more effective in comparison (results are likely higher as Facebook/Meta are relatively better at analytics, so advertisements appear to more relevant people).
In addition, $50 is not a lot to spend on an ad campaign. It generally takes a higher number of advertisement views by the same person (preferably across different websites and channels) to produce an intended result.