I have been using gumtree for 5 years now to promote private German lessons and most of my clients find me through gumtree.
I get that they are not a charity and need to make money so after some grumbling when they introduced a 6GBP fee for adds from service providers, I sucked it up.
Now (well a while ago) gumtree introduced another fee: 5GBP to link to my website (no option to just put the url into the advert). So, I'm left with three options here: 1) suck it up and pay almost 50% on advertising 2) publish the add without link (far fewer responses) 3) leave gumtree (much fewer responses).
AIBU to think this is just one step too far and many small service providers (including me) can't afford the price hike.