I also agree with kapsaa. Although what you guys are saying makes sense, you can read the reviews and check the ratings and they are all good viable methods but sometimes even the reviews are outdated and the forum discussion isn't recent either. There are a lot of updates on RS or on runemate that break some bots and some authors are quick to update their bots but some aren't and at this time the person paying for that laziness/cost is the bot user.
It's also understandable that your argument is that people will start abusing the "free" ride if bots didn't charge for their first 10 minutes but it doesn't have to be as long as 10 minutes, speaking for myself only but i'm sure for most people setting up a bot doesn't take more than 2-3 minutes so even if the "free" period was for 4-5 minutes, it would be plenty and i don't think there are many people desperate enough here to run a bot for 4 minutes 59 seconds and restart it and run it again over and over again for the "free" ride.
It also makes sense that you are asking the bot users to record the logs if the bot didn't work, make a forum post, upload the logs, have the bot author review them, wait for bot author to feel if they need to refund and then have the receive the refund but instead of having two people do all that, wouldn't it be easier to just add a 4-5 minute "courtesy" period? It is always nice that other people's time gets wasted instead of your own but i mean that affects paying customers and from a customer service point of view it would make sense to add something small to save a big hassle for the customer.
My two cents anyways, I've been living with this system but it is annoying to be charged for a broken bot, not that it breaks your bank or anything because realistically in your entire time using RM, you maybe spend additional $5.00 in these "extra" charges which for most people would probably be peanuts in the long run but it just a bit annoying, that is all.
TLDR; Easier to add a 4-5 minute courtesy period instead of having a bot user going through the work of uploading,posting logs and having the bot author reviewing, refunding etc etc.