General ACCAStudy suport

Some sort of retention is pretty normal yes. Worst case is you leave and have to pay it back. Either way it's pretty fair. My company pays for everything, but if you leave you pay back 75%, reduced to 50% after a year and down to 0 after 2 years.

I would say yes, it is worth it. Study support is hard to come by and if you are fortunate enough to get it from your employer, there is usually a post completion clause to stay for a minimum term. Not all employers offer study support, and I had to self fund myself from F1-F9. My current employer is offering full study support and I have to stay 6 months after completion. In your case, it seems you only have access to online lectures and this is sufficient in my opinion. I know everyone is different, but I think part time class room lectures is a waste of time for full time workers like us. They are just rushed and I find that you don't really learn much because of the fast pace. I think only full time students would benefit from class room lectures which probably take place at a steadier pace. But like I said, everyone is different, so do what you feel is right.

In my country where unemployment is quite high, having a guaranteed job after studies is actually a bonus! That being said, one can interrogate the types of packages they will offer a newly qualified individual and compare that on the market. If it is substantially lower perhaps it may not be worth it. (The lower offer of course must factor in the benefit from your studies/other receipts from the company beforehand) However if you do need financial assistance this may be your best way forward.