Uhhh. The point of OTel is that you can host it yourself. And should do imho unless you're part of a VC money laundering scheme where they want to puff up NR or DD or whoever portfolio company numbers.
You should always think about how much it'll cost for you to roll out and maintain something vs how much it would cost to buy the service from a vendor.
Chances are your volumes are low enough it will be actually cheaper to run with something like New Relic or Datadog. When the monthly bill starts reaching 10% of what a dedicated person would cost, it's time to plan your move to self-hosted.
In my experience, the people willing to pay the most to not host it themselves are often the big companies that are long past VC money.
They'll gladly pay someone to do it and have a big team of engineers and planners to support the outsourcing.
Efficiency isn't what bigco inc is about.