Is this accepted?

[kit07]

As for selling service, this is in the grey area, technically you are not looking for party and doing something that SE does not really encourage... You can probably do it but may/may not get nasty tells.

Is there any particular reason why they don't like this sort of thing?

[JustPlainLucas]

Is there any particular reason why they don't like this sort of thing?

Some would call it spamming. I've also seen someone on this board get the definition of advertising mixed up in the Terms of Service, thinking that it also applied to advertising services in-game, but without actually selling services and goods for real life currency. Also, some people don't want to see services in the PF, as they're afraid it will turn into another marketboard, but that has never happened.

[JustPlainLucas]

You could also start up an LS dedicated specifically for map runs. That's what I did, but I haven't been very proactive in recruiting people.

[Barboron]

You can trade in game services and items in exchange for in game services and items. Once you are not trading for something physical or of real world value (this may include redemption codes as they are usually given a value of like 0.01cent/pence or whatever currency you use).

[stuscott]

I have a group of 4 other people that we get together about twice a week and do any pieste maps that we all have - works out well as we all trust each other and follow our own loot rules.